Quantum Physics: The Science That Defies All Logic | Secrets Of Quantum Physics | Progress

Join Professor Jim Al-Khalili on an intriguing journey through the enigmatic realm of quantum physics, a scientific theory that has baffled and fascinated minds since the early 20th century. It all began with a seemingly innocuous question about the functioning of light bulbs, leading scientists on a profound exploration into the sub-atomic universe, where the ordinary rules of reality are flipped upside down.
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[@essexlad8151]

Now this is what youtube is all about! 2 hours of pure bliss.

[@Kogacarlo]

I've never seen such a slow documentary before. Thumb down from me.

[@bpolovich9398]

Lol. Wow. Truly all different kinds of people in this world, as opposed to a generalized "normal" which most would assume is the case. However, in actuality, instances like these make it clear & obvious that abnormal subspecies' are, indeed, amongst us and do, occasionally, present themselves.. most often by volunteering opinionated rhetoric, void of any real substance, yet displaying an incredibly dull mentality - which, undoubtedly, is woefully disengaged intellectuality, which we sometimes take for granted.. also evident is an irreconcilable disenchantment of reality when compared to the vibrant, mindful norm which we endlessly study, adore and tend to thrive in. Unfortunately, for this specific abnormal subspecies, the abnormalities are such that any concept of focus and/or attention span have literally devolved and regressed, almost entirely, down to the *thousandth decimal place* which has rendered all faculties inoperable, to a virtually non-existent state, leaving in it's wake a dramatically reduced mentality, resulting in a complete inability to reason, analyze or interpret even the most minute of observations. This severely compromises the individual's ability to gather the necessary material required in order to think critically or form sustainable hypotheses for future studies. Therefore, vacated is the right to compile data needed to form the eventual theory, also vacated is the ability to form a meer opinion on any given subject, despite the level of importance, or significance. This is a great example of just how reduced the individual will inevitably become, after an incomprehensible regression into a single point, void of meaning, only capable of contributing impulsive linguistic patterns which are spewed into existence and onto the faces of the intellectual, sophisticated, scholarly noblemen. Shame, really. Pity! @@Kogacarlo - Wishing you miraculous recovery by any means possible

[@customtile11]

you will die in this impression and will not understand anything and will return again, but it is unknown in what form, in what place and in what position😄

[@persona2grata]

@40:00 For those interested, the Helium "problem" refers to stars early in the age of the universe with only about 1/3 of the helium expected, helium being produced by fusion within stars of hydrogen. Measurements showed more carbon, nitrogen, and oxygen in the stars than expected, which leaves open this question of where did all the helium, one of the most abundant elements in the observable universe, come from? As this measurement of helium came from a small sample of stars it could simply be an anomaly, or if actually representative it could suggest that there was some kind of secondary fusion taking place outside of the stars converting hydrogen to helium. I'm not an expert but I believe that these days the more common belief is that how much of a particular element stars produce is based upon their characteristics like their mass.

[@Aditya-yg1ce]

There is something about how Prof Khalili explains things that make me nod my head as if I understood things which i could never comprehend, like ever.

[@hennersss]

😂 Like looking at a piece of modern art and pretending you "get it".

[@stevebrindle1724]

@@hennersss I like your modern art analogy but personally, I think most of modern art is shite, things like a fucking brick wall that to me is just a fucking brick wall and I am prepared to say what I think here, not pretend to see some non-existent hidden meaning. Good luck to the artists if they can earn a living conning middle-class prats but I am not having it! As for Prof Khalili's explanations, they seem perfectly clear and understandable to me as they are after all aimed at the layman, not other scientists. The fact he never uses or talks in depth about the mathematics behind all of Quantum theory shows this!

[@stevebrindle1724]

He is easy to understand as he is aiming at explaining to intelligent laymen, not other scientists and that he never delves into the mathematics behind quantum theory shows this. If you cannot understand him why bother listening? Perhaps you should stick with cartoons! 😜

[@Aditya-yg1ce]

@@stevebrindle1724 😅. True.. true..

[@TLFX09]

opposite to me, i think he gives to many rounds and rounds.....make easy things more complicated

[@x19fan1]

Mr. Cook- why you chose to end your life is a mystery to me- but watching you set up and demonstrate the two slit experiment drove me to be a physics teacher. You made a difference…you did… because I have been blessed to have taught students who have accomplished so much ! You truly did change the world because you inspired a basic kid to do so much better…

[@michael.forkert]

_Who knows that he took really his life. Isn’t there the possibility, that he was put aside, because he wanted to expose the masquerade?_

[@nomandad2000]

@@michael.forkertwhat masquerade?

[@michael.forkert]

@@nomandad2000 whatever

[@nomandad2000]

@@michael.forkert whatever is right. Mr. Conspiracy. At least tell us what it is or are you just smarter than us “sheep”? Why even post that if you aren’t willing to educate us as to this secret information you are privy to? Just gonna lay out a little tease and tell everyone to get lost when they ask? Wow you’re so smart.

[@michael.forkert]

@@nomandad2000 _Calling your interlocutor names is not scientific._ _If you like to be bamboozled, nothing can be done._ *_Just in time!_*_ It’s not me who’s pretending to be smarter than the sheeple, it’s Mr. Khalili and his pseudoscientific comrades. Those pseudoscientific bamboozlers, who are crowding the Internet, _*_CONVINCED YOU_*_ and millions of others, that they are infinitely smarter than the majority._

[@cetateanu9669]

I never liked the school.But I loved physics lectures.I left the school and now I am watching quantum physics and can easily understand. Thank you, Sir!

[@everythingisalllies2141]

If Quantum defies all logic, then it cant possibly be understood by logical scientists. If you can figure out Quantum "rules" then its not defying logic is it. BUt in reality Quantum is hocus pocus mysticism repackaged for the gullible idiots of today.

[@williamwilson2270]

would the study of quantum synthetic vibrations be used to create low level electronic vibrations to generate artificial vibrations to Smellivision to enhance the modern television experience? It would be a massive undertaking but I think it would be possible given time to generate a library of electronic created synthetic scents to insert into images.😮😮😮

[@scandalouslando204]

He makes it easy to understand, especially for me, I know nothing 😂

[@monicarenee7949]

I studied quantum physics in college and have watched endless amounts of quantum physics related content on KZbin, and I’ll say the card dealing example is one of the best ways I’ve seen Bell’s experiment explained. Made it very clear for someone seeing this for the first time or even anyone really struggling to understand

[@kwimms]

Quantum Physics is little hat nonsense designed for egg heads to fry their egos on.

[@lejoyrvarghese562]

😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊

[@Favourites669]

Hell yes!!! More docs with Herr Al-Khalili are always welcome. This guy should have his own channel! Thanks a lot!

[@d.c.8828]

Seconded!

[@jestermoon]

Close your eyes. 0:54 He paints pictures in my mind. 1:32

[@thearmchairspacemanOG]

The guy is a pillock. a BBCTV-trained pillock he should NOT have his own channel, there's ENOUGH of the BBC's little imperialist scumbags online as is.

[@marktime9235]

Couldn't agree more! Definetly my favourite science presenter, I WISH he would do more. So easy to listen to, I've watched most of his videso several times.

[@DoseofScienceDoS]

Lol, you are so excited for a five year old show?? You could have watched this anytime. 😂

[@pentagrammaton6793]

Physics doesn't break down at quantum levels, but our understanding of physics does.

[@ventura433]

My thoughts exactly, sounds extremely arrogant from such insignificant apes .

[@macysondheim]

Yes we know… if they thought physics broke down at the quantum level they wouldn’t be doing experiments to try & figure it out. The reason he put ‘When physics breaks down’ instead of ‘When our understanding of physics breaks down’ as the title of the video was to keep it short & not have a long drawn out title. It’s not because he literally thinks physics won’t work beyond our understanding….

[@1roblock]

His honesty isn't good enough for you? You are right, of course. Our understanding (given materialistic assumptions about the nature of ALL reality) breaks down. Case in point, Einstein said, "I'd like to think the moon is there when I'm not looking at it". Einstein's intuition was correct. There is a deterministic aspect to reality that makes it objective to you and I. Our observations and measurements, however potent they are, do not define EVERYTHING. But this does not mean that everything is determined mechanistically. Conscious agency can also determine and define (measure), according to purposes independent of material causality. You are fooling many with your assurances (look at all those thumbs up). But not I.

[@TheSensimillionaire]

​@@1roblock what?

[@iambiggus]

@@TheSensimillionaire How to say absolutely nothing, but say it well.

[@VernonNelson-r6b]

What an incredibly simple explanation of a mind-boggling idea. My first psychedelic experience changed my life. This video has changed my understanding of the world. I have no experience in physics at all... But this video has Open my mind to a world I did not know existed.

[@michael.forkert]

@ 28:00 You can enjoy Jim Al Khalili giving his lecture about Quantum Mechanics on a bar counter at the sound of jazz music American Jazz Musicians were exporting to the whole world. That’s really the modern Physic at its finest. Really! Congrats Mr. Khalili 🎉🎉

[@EuphoricsDnB]

And you know what's insane? The lyrics in that Jazz song are about "Double-slit experiment" : (When I look at you, you change your behavior)

[@JohnJackson-mn4ts]

The answer “I don’t know” is where new ideas and new science is found.

[@timredd]

Jim, in his special way of explaining the complexity of physics, makes it simpler, so the understanding of it appeals to a layman of the subject.

[@benjohnson7930]

All matter is connected and all matter communicates at the subatomic level, this is how ideas become realities.

[@michael-jo7qd]

Some times our thoughts are not our own either Quantum thought Entanglement oooh 😅

[@us3rG]

Nope

[@bigguy8586]

I've seen all the laws broken here on Earth: time, motion, potential energy, kinetic energy, gravity, all of it. I watched time stop for all objects except me, same for gravity and motion. A clump of dirt flew in and was frozen in front of me. I also forgot that I was in the middle of a car accident and the car was in the air as well as we hit an embankment at 85 mph. All I cared about was what this thing was that flew in the car. It looked like dirt but dirt doesn't fly and stop. I had to scoot up to see it better. I still couldn't see it so I had to loosen my seatbelt to scoot all the way up. I put my eyeball right next to it and saw that it was a clump of dirt. Then I remembered about the car accident and had a quick panic attack. I checked my seatbelt and looked at my friend. His face was frozen just like the sand. I saw his seatbelt on, then boom. Time came back on. My friend didn't have it happen to him. It was like pushing pause on our environment including my friend; pausing everything except me. I stayed in normal time, gravity still worked for me as I wasn't floating. The sand looked still floating in the air. I figure that it took about 15-20 seconds to scoot up, then again, then freak out, finally check our seatbelts. It wasn't an adrenalin rush like everyone says. I was completely calm and normal until I remembered what was happening and realized that time was stopped. Then I freaked out, but before that I was normal. That is one of like 25 stories that happened to me. When I was ten years old, it happened in front of my parents. I was doing my homework and the phone started ringing. I looked at my dad and he didn't move at all. Looked at my mom, the same. I get up kind of upset nobody was getting the phone when I was trying to do my homework. My dad looked at me like WTF and my mom got up from the other conjoined room to see what I was talking about. When I got to the phone and was reaching for it, it rang for real. The two rings overlapped each other causing a much louder ring. I was instantly sick and going to faint, but my mom caught me by my cheeks and told me I had a gift of ESP. I slept for a day and a half. There's two. This life is an illusion, a simulation. I know that's hard to believe unless what happened to me happened to you, then after thinking about it for 30 years, you would have the same conclusion as I have had. It has to be a simulation. All of you are simulated. Why am I writing this then if you already know that? I guess for the chance that someone may know how to get out of the simulation. The exit.....

[@khall187]

I would love to interview you about your experiences

[@CamillaPerez-br1dg]

The only man who defies his own theories by never growing older. The much loved Jim Alkahili

[@danielpaulson8838]

Thanks for re-posting this fine science material featuring a favorite, Prof Jim Al-Khalili. People will watch the Big Bang Theory, TV Sitcom again and again. I like re-watching good science shows.

[@henrikmartikainen8472]

Kyllä. Tämä luento avasi minun ymmärrystäni avata mieleni havaita paremmin ympäristöäni. Kiitän tästä❤

[@johnclancy5027]

seriously this guy should be required reading in schools explains things very clear and concise learning is fun again !! bloody smart chap.

[@cresenteayo3638]

In 4th year highschool one of my favorites is Physics. Two Sections A and B attended these class altogether about 50 senior students. In short quizes involving formulas I beat the best and honor students so do in world history subject. My physics teacher was surprised why I was leading while honor students tailed behind me. But that inclination halted in college my course is different from my academic interest.

[@NarenLumpkin]

Man yeah realize support cause the world can’t support what it can’t see .❤❤❤

[@Neighborhoodcarpetcleaners]

Please explain the decline of interest when in college

[@jk-video2716]

Sir, your explanations are WONDERFUL! I have always thought of reality as obeying laws that are sensible, but quantum physics gives the impression of not doing this. String theory attempts to make things a bit more sensible, but probably is not the answer. In any case, the way that you put real world explanations to these things is so very good.

[@gurdialdhillon5785]

Brain will not faster than natural evolution less than earthquake

[@bertrandruskin3406]

String theory was hyped as the answer just a few years ago..... it solved so many problems. Alas, as one absolutely final theory to explain everything goes down the plughole, another one emerges which is next final theory to explain everything. What atheists need more than anything are theories.

[@1roblock]

@jk-video2716 much of the physical world follows logical laws that are comparatively easy to grasp. And our faith in the uniformity of nature (at least in terms of its being logical) is well founded as a result. But if a conscious observer is involved, in order to understand how more difficult problems are logical, we would have to comprehend the purposes of the observer. And that may not always be possible.

[@leolima75]

​@@bertrandruskin3406then give up writing your non-sensical points of view on a device which only exists thanks to those very same theories.

[@emmanuelmwape4560]

Thank you for this breath taking work connecting quantum dots from the past to the present. The story has just begun.

[@lochvast1180]

I think its very interesting that the electron produces the same pattern as a photon because it has charge. If we say that the electron is in a superposition before interacting with the detector, cancelling out in areas of desrructive interference, the question arises whether charge would play a roll. But it clearly doesnt. The wave function does not account for the particle's own charge, but the charge of other particles. How is this distinguished? And ill point out that photons can exist in the same exact state as bosons are exempt from the exclusion principle. So its not as if it is somehow bouncing off itself in a state of superposition. This is truly bizarre and unique.

[@ajoebo9095]

Jim Al-Khalili, I did my best to follow your excellent lecture explaining quantum mechanics in layman's terms. As try as I can, however, I still do not understand why it is that Bell's experiment showing sums less than or greater than two answers the question whether Planck or Einstein was right in explaining the uncertainty about entanglement and whether there is spooky action at a distance or some hidden variable that underlies and explains entanglement. Is there a chance you could explain why knowing the answer to be < or > 2 is outcome determinative?

[@charlesmcmillion5118]

Bell's Inequality.

[@key_bounce]

Look up the wikipedia page. They go into the math. There's a *lot* of math. It's not that difficult, but it will take you some time and effort.

[@Speedmaster1200-d8u]

watched this couple yrs ago on bbc. Jim nails it again. Great bloke, excellent presenter, very very interesting. more please

[@NarenLumpkin]

There is no reality to perceive without awareness of the perceiver percieving “reality”. As my father often said “reality is in the eyes’ 👀 of the observer. ❤❤❤

[@michael.forkert]

_Reality is in the eyes of the observer, not on the tongue of pseudoscientific bamboozlers._

[@sunbeam9222]

Indeed. I don't know what the fuss is all about 😅. We shape our reality according to what our attention focuses on. Makes perfect sense to me. Where's the mystery?

[@larrywalsh9939]

This is the third time I've seen this exact documentary, featuring Jim Al-Khalili, under a different name. I can't remember what the original production was, but the second time it was published under Spark. The fact that it's now showing up on this channel with none of the original production logos does indeed make this look like stolen intellectual property.

[@WhoaBo]

Welcome to youtube bro. Half of the documentaries ans news on here are uploaded by a channel that stole it from another channel.

[@jean-claudesteffens8466]

This is just the explanation about quantum mechanics I was waiting for in years. Thank you for that Professor Al-Khalili. In my understanding Physics is aimed at associating models (numbers and equations) to the real things. Models are there to predict the result of future experiments, which then prove if they were right (aka: applicable) or wrong. So I have no problem if a (relatively) free standing electron, or a crashing electron on a detector follows the particle model, while a fast traveling electron fired by the gun follows the probabilistic wave model. What I miss in this case is a description of how properties of the electron are modified when it is "fired" (or: what makes it "evaporate" to a probabilistic wave). Similarly, how the electron properties are modified when it is "detected", "measured" or when the probabilistic wave "crashes" on some obstacle to crystallize again as a particle at a (somewhat predictable) random place in space. Studying these transitions could be more profitable than arguing on "which reality is real". Concerning entanglement, did someone look at it as two crystallization's of a single wave ? The video suggests that the second coin continues to turn when the first one is fixed. Isn't that misleading ? when the first one is "detected", what if the second one has been displaced out of reach of a detector ?

[@everythingisalllies2141]

But what an admission to make, that" QM defies logic".. In other words, its not rational. In even more words, that means that it cant be studied by rational logic humans, who's only way of discovery is by applying the rules of logic together with a rational understanding. So maybe we should let patients on mental hospitals study QM? because they are irrational and illogical? And their thinking can not be understood by those that are rational and logical. But maybe scientists ought to reconsider their interpretation of those few observations that led up to the belief that there was a new science at work, namely QM. Its more likely that they are flat out wrong. But too pig headed to admit that they have been fools. Another bit of "science " that is irrational and illogical in everything that Einsteins said. Few people have realized this fact thought. Meantime is a great article of faith for the believers.

[@zweisteinya]

Applying Doyle's Law, if QM is right, then 'Logic' is wrong.

[@zweisteinya]

​@@everythingisalllies2141you got it - 'Physics' is a CULT, and its 'purpose' is job security for jUniversity 'professors' (of the 'Phaith')

[@everythingisalllies2141]

@@zweisteinya thus QM must be wrong.

[@ghostandbunny1192]

@@everythingisalllies2141 You can really tell when the uneducated start taking "educated" guesses looool

[@nuranigeria2080]

Never underestimate the power of human thinking. It's destined and intertwined within the man to explore or destroy many things.

[@estasbienbabosoo]

this. one persons energy is much more than one thinks!

[@mathsinmarathibyanillimaye3083]

For about two hrs it was a great experience and at time when got out of trans, I found myself a dump as I was seventy years back.....a high school graduate.... thanks a lot....a great experience.

[@ct6910]

I used to watch Harry Potter and wish I could live in a world like that, but as I got older, I realised that this place is way more magical.

[@johnlitwiniec3206]

if you were young for Harry Potter, you do not have much experience as an "older" person. Take that from an old Baby Boomer. You still have many adventures to live through. Too many to list here. You will live and learn so much more. Take what I say as a friendly jibe. I wish you well on your journey through life. First and only piece of advice is avoid the death eaters. Sorry, I lied. Get to Universal studios to experience Harry Potter worlds. Spend the bucks to buy the interactive wand. You get to do spells that animate your experience. Good Luck!

[@hulamei3117]

More magical each day!

[@ryanvanzant4788]

More over Harry Potter...😂

[@Michael_Bradburn]

Nothing has fixed value. Everything is variable and ever changing.

[@hydrorix1]

Incredible production of challenging material + riveting cinematography makes Jim Al-Khalili authoritative and entertaining! Exquisite, sir!

[@ashbb9165]

Dear Jim my name is Chris and I love your work thank you very much. It might sound unscientific but god bless and good luck x

[@paulperez6132]

Quantum physics is the closest thing we have to actual magic 🎩 ✨️

[@Sam-yf4kt]

Reality existing is the real magic

[@NarenLumpkin]

Rather consider really seeing the world around and within you.❤❤❤

[@gleambrite2679]

The proton itself the nature of light, our consciousness ect.. So close and yet so far away. 1 and 0 at the same time until it's observed or measured. We are living in exciting times for physics. Good job.

[@Frogger790]

Thank you! I never took Quantum physics or mechanics but I’m wanting to learn what the big deal is all about. ❤

[@BeelySalasBlair-uy5wn]

Yeah, what's the big deal!! 🎉😂💚

[@ZeeshanAkram1976]

Listen O believers....The big deal is God himself...the omnipotent the omnipresent the ultimate/obvious/absolute observer of all the particles of univrses.....so all existence remain in place ... When no body is seeing the creatures or existence......God says this in Quran in these words ....chapter 53 Fussilat ..verse no 41 And does it not suffice as to your Lord that He is The Ever-Present Witness over everything? We shall show them Our signs in every region of the earth and in themselves, until it becomes clear to them that this is the Truth. Is it not enough that your Lord witnesses everything?

[@michaelwood3146]

Knowing creates unknowing at the same time; they arise mutually.

[@DK-nx9ri]

I love how they framed the most important battle about existence of reality into a dance hall of the 20's. No matter how important and how big the Bohr - Einstein battle was the majority lived with even more important agenda. Dance, flirt, gossip, seduction,sex. I love those two planes presented together.

[@DownhillAllTheWay]

"Dance, flirt, gossip, seduction,sex" are the things upon which our future as a species *_truly_* depends.

[@bigboicreme]

Bruh it ain't that deep

[@NarenLumpkin]

The quantum particles can tunnel because they are vibrating on the field your reality is projected upon!❤❤❤

[@davidmiller9485]

For those who don't know, this is where Schrodinger's cat comes from. He and Einstein came up with it to show how silly "spooky action at a distance" really was.

[@Bill_Garthright]

I'd always heard that "spooky action at a distance" was how people thought of Newton's ideas about gravity, at first. After all, how could the Moon affect the Earth, and vice versa? But maybe I heard wrong? You never know.

[@DownhillAllTheWay]

@@Bill_Garthright I can't say you're wrong because I don't know for sure, but I just looked up "spooky action at a distance origins", and found references only to Albert Eintein having coined it. I also searched for any refernce to Newton in the phrase, but all I found was that Newton said that gravity caused "Action at a distance", with reference to the earth/moon attraction - but no indication that Newton thought it "spooky". Incidentally (fun fact), Newton declared that he saw further, because he stood upon the shoulders of giants (a rare moment of humulity from what I can gather). When Einstein was asked by a reporter if he stood upon the shoulders of Isaac Newton, he replied "No. I stand upon the shoulders of James Klerk Maxwell". However, I did find an Einstein quote about Newton : ""Newton, forgive me," wrote Einstein; "you found the only way which, in your age, was just barely possible for a man with the highest powers of thought and creativity. The concepts which you created are guiding our thinking in physics even today..." And, of course, he used calculus - though Leibniz should probably get the credit for the calculus we use today.

[@casteretpollux]

​@@Bill_Garthrightthose things don't depend on a human

[@Bill_Garthright]

@@casteretpollux Huh? Sorry, but I don't understand what you're saying there. How is that a reply to my comment? Or maybe you accidentally replied to the wrong thread? That happens, sometimes.

[@rydz656]

No one takes Einstein serious anymore, he married his cousin.

[@MotDoiAnLac258]

Great video!! Extremely informative and interesting

[@stephenforest3345]

This video was already shown on KZbin about 5 years ago. Don't see how its suddenly only 5 days old?

[@abcdef-qk6jf]

Well I guess it's like meat in the supermarket. The first date is when it's sold as a steak. Not getting bought it's cut into pieces getting a new date as meat for a stew. Not getting bought it becomes minced meat getting a new date. Not getting bought it becomes sausages and a new date. Not getting bought it could become a part of a pre made dinner only needing a little heat to be eaten. Not getting sold it doesn't get a new date but a considerable discount. Someone is almost bound to buy it. Thinking it was only made yesterday - if I eat it today it will be safe and almost as good as new. It might very well be safe - it's just not "fresh" and started life earlier in another context. Essentially the same and legally only a few days old... Luckily the videos ages well without a sense of being outdated. If you missed it the first few times around - don't worry - it will find a way to you one way or the other....

[@mariusbogdan9036]

The best video I've seen on quantum physics! Congratulations! My soul calmed down, because I thought the same way about this topic, even though they taught it differently at the university. I'm just an electrical and sound engineer, retired but still active. With a device I made that works on quantum physics principles, I can greatly improve the characteristics of cables, speakers and other materials used in audio technology. Even the high-speed cables used in IT (CAT 6 / 10GB / sec). I wish everyone who participated in the making of this video good luck and good health!

[@JoyceSigns]

Wonderful! Thank you. 😊

[@grantbartley483]

QM doesn't defy logic, it defies our normal understanding of matter. But our normal understanding of matter is merely a construct from our representation of the material world through our senses, which is itself at best an approximation of material behaviour at a much larger than quantum scale.

[@midbc1midbc199]

The biggest problem with physics is observation and how a particle is coupled or not since our observations can only see what is in the past of what we are looking at......since light has a limit in vacuum it cannot travel faster than itself and there is always a length of time and distance that always is part of our calculations we can only view something as it was and not how it is from its own place in space time......we can never observe anything unless it from the past no matter how small the length of time which also means time would have to be infinite

[@DoseofScienceDoS]

Good job with the word salad!! That is not quantum mechanics

[@midbc1midbc199]

@@DoseofScienceDoS......it's how we observe things is our trouble.....of course you probably have the answer......and yes it is quantum physics and it rules the universe and the Planck length is the smallest possible thing we can observe......kinda like how we jumped from optical to electrons for seeing things smaller than a photons wavelength What's your genius suggestions

[@DoseofScienceDoS]

@@midbc1midbc199 explain what a length of time is. Because a length of time isn’t a real thing. Do you mean distance or did you make up some word salad?

[@midbc1midbc199]

@@DoseofScienceDoS......don't you understand spacetime?.......time and distance

[@DoseofScienceDoS]

@@midbc1midbc199 you didn’t say space time, you said time length. You don’t get to make up words, that is called word salad. If you make up words, nobody understands what you are talking about. Learn the normal lexicon before you speak, please.

[@MissMaya3.1416]

What a presentation! The way you summarize my whole syllabus topics i have been Reading only in the books..U make it more easy to understand

[@michaelccopelandsr7120]

Time is fascinating. I worked the subway stations for nearly 10 years. From one end of the city to the other. Every so often I would notice the city would be saying that, "Today just flew by" or "The day was just dragging along." How can an entire city, with no interaction with each other until they used the subway, complain about the same time paradox unless it was effected by it? Maybe a time distorted bubble the earth passes through in its revolution around the sun. Maybe random waves of time distortion hitting the earth? Maybe they're given off by the sun. Maybe they're from outside our Terran system and reach us in intervals. ???? 🎶Ti-i-i-ime, is on my side. Yes, it is!🎶 If you can think of a better way to do a blind survey of an entire city, in the small window of opportunity, I'm all in. Until then, I invite you to spend a couple years in the subways. Between 2pm-10pm and you'll see for yourself. Just listen as an entire city gets off of work and gets out of school. You'll see it's more than a, "coincidence of circumstances."

[@joesands8860]

Or it could be conformation bias on your part.

[@sunbeam9222]

​@@joesands8860could be could be not. Still interesting theory.

[@wlljohnbey1798]

This was an awesome video... Opens up one's mind to a new way of thinking.

[@nickk6518]

Professor Al-Khalili is to Physics as Sir David Attenborough is to the Natural World and Lucy Worsley to History.

[@CoreyChambersLA]

A particle is a collision of waves. Observation requires a collision of waves. Waves that are not colliding are of little consequence to us, not observable, ignored as not "real".

[@geoffreysummerhayes4793]

Two questions come to mind watching this. First, what does 'the other particle simultaneously changes' actually mean in a relativistic universe? They are separated by an interval, so we can change the time and distance by switching inertial frames. Second, the robins. Assuming the electrons are entangled, how did that happen and still guarantee they ended up in the correct positions?

[@johnmonk9297]

Because God knew what he was doing when he created everything

[@jaybingham3711]

​@@johnmonk9297The Flying Spaghetti Monster was the creator of all gods. All hail his noodly goodness.

[@rcherrycoke7322]

Which god - there’s a few apparently ?

[@gurdialdhillon5785]

How merge as a human being born amazing we don't know who and how and us ❤❤❤

[@helm311]

​@@rcherrycoke7322 Apparently the proper one. 😆

[@NarenLumpkin]

Space and time are relative obviously.❤❤❤

[@JasonLambek]

Uhm, this one isn’t exactly new though. Don’t get me wrong, love it. Clicked it immediately. But, yeah, had it saved for quite some time.

[@alangarland8571]

Agree. It's an excellent video, but I first watched it around 4 years ago.

[@thetempuragirl2805]

Has anyone else noticed this 22:20? "But when I observe you, you change your behavior". Lol I love that clever peek into an important aspect of quantum physics.

[@NarenLumpkin]

What causes this aspect you speak of presumably

[@ellflynn]

@@NarenLumpkinentanglement

[@shekharkalley7431]

With a blink of a eye every thing change's that is wonderful playing around in this world just enjoy the little times we have with our love ones. ❤

[@springspring9029]

Amazing how all of a sudden Quantum physics is coming out of the woodwork!! I love it! Thank you Nicholas Tesla ❤

[@danielpaulson8838]

Niels Bohr brought us Quantum Physics. Tesla brought us A.C. power.

[@zelddan]

Tesla was an (overrated) inventor not a scientist.

[@clittle1559]

​@@zelddansays the oligarchy because tesla wanted frèe energy

[@Vigopl]

In the second half of this video, he explained me everything what i gave up to understand long time ago. What a man!

[@bandulaamarawardena6576]

I think we need to consider the ground radio-activity resulting in alpha-particles, near volcanos, and even in volcanic ashes that spread to long distances when we think about the mutations due to protons. This could also explain how billions of different species of different sizes and shapes were born to the world many millions of years ago when the ground radio-active levels were high due to thousands of volcanic eruptions. Of course then nature applied natural selection explained by Darwin.

[@NarenLumpkin]

Get quantum buddie there is only now the past and the future are both seas of potential.❤❤❤

[@NarenLumpkin]

Perhaps indeed we seem to have a most pre/post cataclysmic event history.

[@autonomouspublishingincorp8241]

How do you add negative decimals together to get a positive result? Math was WAY wrong on that lazer experiment, even with the basic addition (but to be accurate would have also needed to find the average, which therefore would have meant the result would need to be divided by three for the number of attempts, but given that negative anything added to negative anything remains a negative, it was most certainly NOT greater than "2".) Virtually everything ever disputed from Einstein's views have turned out to have held true (Although Tesla's interpretation displays a better understanding of energy in general than what Einstein generically attributed to gravity alone.) This can not be said about Borne or Bell. Although in today's societies these ideas have become more popular, it's akin to adopting a philosophy that justifies what you wish to believe rather than accepting wherever the facts lead you. Today's "quantum physics" is nothing more than a suedoscience, always pointing to quantum mechanics and other genuine sciences to dress themselves up as a science (as all fake suedoscience does) but at the end of the day follows no scientific method, offers no genuine proofs (outside of mathematical representations to prove logical consistency) and unsurprisingly has developed exactly nothing other than flashy titles to help dupe donors into cutting checks. The obvious but unpopular conclusion is simply that what is commonly observed is not commonly understood, or more precisely, not understood at all.

[@leftear99]

Watch it again, see if you can find your mistake

[@helifynoe9930]

Yes, a 3D reality, residing within a 4D space-time reality. Two radically different sets of laws of physics. Examine the 4D laws of physics from a mere 3D point of view, and things seem very bizarre indeed. Again and again, you will see the 2 slit light experiment being discussed or demonstrated, and how minor changes can determine whether you will end up with an interference pattern, or not. But never will they mention that these minor changes determine which set of laws of physics come into play. HOW ODD OF THEM ???

[@alangarland8571]

Yeah, "They" are no doubt up to something nefarious, (everyone says so).

[@rodkeh]

There is only one set of laws in Physics! Only swindlers the uneducated would believe otherwise...

[@careendapde7664]

This man is so gifted.The best kind of storytellers that make you never forget❤

[@AnthonyHigham6414001080]

This is a BBC documentary series "The Secrets of Quantum Physics" first broadcast on the 9th December 2014. Not acknowledging that fact is copyright theft. Reported.

[@just-dragon-yt]

nobody cares really, these documentaries get lost and unwatched over time so someone re-uploading it isn't bad.

[@michael.forkert]

_As Johann Wolfgang von Goethe stated: “Science is very hampered by the fact that one focuses on what is not worth knowing, and with what is not knowable”._

[@tomasneel1980]

theres a more correct term for that , when entropy and exotic theories break down, its called God.

[@sgartistry1418]

Prove it.

[@anilbera9499]

@@sgartistry1418 anything that can be proven is not God.

[@abcdef-qk6jf]

Anything involving faith and beliefs is involving a god or gods. Science isn't absolute either. You can study doing experiments making a theory plausible. There are many levels of scientific proof. It can relate to a very specific subject under specific circumstances. It could be applied in a wider context being a general law/theory but not being specific. In fact it could be any combination thereof. Theories are more often than not a working model applying the knowledge in a way that brings understanding - but not entirely correct. Engineering is science put to practical use... cutting corners - things have to be safe and working. You add a little here and there to ensure things are safe and working properly in a given interval of time. Some scientist believe in God but see no conflict. As scientist they speak upon matters they can prove or make plausible. Religion is another dimension. Copernicus discovered the Heliocentric System. The sun being the middle of the Universe and everything else being in orbit around the sun. He himself was a devoted believer. He saw it as a form of worship understanding the inner workings of Gods creation. Adam and Eve took a bite of the Apple of Wisdom - why they were kicked out of Eden. Having knowledge they now had to use their intelligence to make a living. Just like young people graduating moving away from home. As far as I know most religions encourage getting knowledge (both sexes). All major religions have it including Islam. Traditions and cults derived from the original scripts may have other rules - but they're not found in the "original" religion/scripts. Adam and Eve were basically told to use their brains. People using religion to debunk science are just as wrong as people trying to debunk religion with science. To different systems you can't apply rules from one to the other. The simple saying of comparing apples to oranges. They're fundamentally different. You can't compare. The measuring sticks are different as well.

[@paxanimi3896]

When some branch of knowledge breaks down is called ignorance. God is ignorance in disguise.

[@sunbeam9222]

​@@paxanimi3896we create God to our image. Your god is ignorant because of your own lapses.

[@bfhfhfhdj]

Completely does my head in. But I love it!

[@nazriali215]

I loved the scene of club house set-up at minute 20:30, where Prof Al-Khalili 'time traveled' himself back into the year 1922 to explain on the light theory. Really nostalgic and classic moment.

[@thetempuragirl2805]

Listen to the lyrics at 22:18

[@GaryckA]

These Al-Khalili documentaries are a real treasure

[@richardbailey3343]

In the end reality is a local phenomenon unique to each of us but as a whole universal to all of us through entanglement😮.

[@nomandad2000]

If you ever wonder about the existence of the physical world when you aren’t looking at it, try falling asleep at the wheel during rush hour.

[@a13xdunlop]

All part of the illusion.

[@brianmason9803]

Jim says that wonder is just how quickly the tadple turns into the frog and clearly this is true. But also, the wonder is just how slowly the same thing happens. During these weeks of transformation all states of the change must continue to be life-viable or it would die. It's one thing to gradually change a car into a boat over six weeks, but quite another to say that at all stages of the change you can use it to get to work each day. Amazing!

[@judebrown2672]

Brilliant program very informative but at s simple level

[@monty3854]

I'm convinced Jim just makes these documentaries in his spare time.

[@vkdeen7570]

it's all relative

[@scottgreen3807]

As we start, as an electronics “dude” I can’t help but note that the light bulb as a vacuum tube lead to the first electric switch the vacuum tube! They knew about the transistor or diodes for yrears before they figured out how it worked. It was expected to create energy which I did not but led to switch controls witch inject power control by design. Based on this , we are half way through a next such tool.

[@naturallyaspirated7829]

I wish we could have total world peace so we could focus on these questions

[@phanh355envol]

The video is a treasure trove of information.

[@bigboicreme]

Great double slit explanation

[@youtubesurfer1533]

This documentary is oscar winner indeed! very beautiful

[@theresachung703]

I love his wonder and joy. It’s so infectious

[@jsc1227]

Super great analysis, opening my mind to ideas never previously considered great program

[@davidwalker5054]

The quantum realm is so far removed from our everyday experiences that our brains are not evolved enough to mentally grasp it fundamentally we can predict the results of quantum experiments but how those results were reached is beyond our comprehension we might have reached a limit to our brains capabilities a sort of cut off point what we can not think past

[@QuantumMechanic]

Reality's not just Netflix for particles, it's a live-action show we're in! Our gaze shapes the narrative, like nosy neighbors judging a parallel parking cat. The universe bends to our gaze, a mind-bending power to explore. Come follow the Quantum Mechanic!

[@terieffo8]

An exciting period of history.

[@NarenLumpkin]

Yes we are inside many blessings as well as many curses.❤❤❤

[@deewells1965]

Keyword, "Professor". The one who professes (to the layman public). There is a section in professorship applications about public outreach. For most of us scientists, this section is left blank. Really! Scientists are mainly really bad at public outreach. We just do our research hoping no one in the public ever asks what we do for a living, partly out of fear of trying to explain. Jim Al-Khalili amazes me. He does excellent science and also does excellent public outreach. Must be an alien. :)

[@schmetterling4477]

We did public outreach about quantum mechanics in high school science class. Did you forget all of that, already? ;-)

[@Alyssa_aria]

Ahh i love how this was explained

[@hennersss]

One of the few people who look EXACTLY as their voice sounds. Thanks for the content

[@hanslepoeter5167]

So, if the electron is everywhere when passing through the slits,does that support the single electron universe ? Could it be that there is only 1 electron and we observe the same one everywhere ?

[@happydays2300]

You just said it. "Nothing travels faster than the speed of light." Get it? Get it? Nothing? Nothing can travel faster than the speed of light because it's........nothing. Like a vacuum? Like the vacuum of space? It's an artifice that we are separated in the first place, or should I say, it's a set up. Spooky action at a distance is proving that it is an illusion to think all things are not connected. It surprises me that he didn't realize that's how he got all his ideas. He's been recorded explaining how he got his deepest thoughts....did no one tell him the further in you go, the further out you go?

[@scandalouslando204]

Im new to quantum physics and im addicted. i became interested because i feel like our picture or outlook on reality is completely flawed, so i came to get answers.

[@stevekirkby6570]

Great explanations... still, mind blown :)

[@abcdef-qk6jf]

I've done measurements in Automation, Control and Regulations as well as using radars. Quantum physics... I almost feel sorry for the physicists trying to measure why, when and how it works. It's like opening Pandoras box - you've got hope as your only friend. First the theories involved are a plausibility of something happening in the first place. Now trying to use predictions of where to measure where an action takes place. You can either measure where it ought to be and how it travels from point A to point B. But you can't measure the weight at the same time. But of course you can make multiple experiments and use the actual data to gain knowledge from them calculating the most likely outcome. The issues of how, when and why you measure in the first place. Trying to make the correct parametres to filter out unwanted data (noise) Then figuring out how to represent the data in a meaningful way. Now having used the combined knowledge of the brightest minds and all the best of all available technology to weed out all the errors either known or probably having an effect or the possibilities of unwanted side effects. Just getting results that can verify you're getting something right and closing in on the target must be a tremendous relief making all the frustrations and headaches worthwhile. Now homing in on the target discovering - you've got two particles at the same time. You know it's impossible - something can't be in two places at the same time. If you turn on the tab on a hose full of water - it very quickly flows out the end. Not very surprising - you know it's not the water you've just put into the hose running out of the other end. It's "old" water being pushed out. Filling water in an empty hose - it will take some time before the starts to run. No surprise either. In a manner of speech. The action is like another person saying hello to you. Instantly the person gets teleported a few yards away. From your point of view you would experience the other person being at two places at the same time. The sound is a lot slower than the speed of light. Why you would experience it as being the same person being in two places at the same time. In radars I've experienced the same. By the looks of it. You've got two identical targets, but you know the sky is empty except for one target. You get a ghost representation. You know it shouldn't be possible - it's a false representation. Something else must be at play creating an echo. To my basic knowledge it's almost like the impossible experiment with the person saying hello. It happens so fast my brain and senses are fooled. Are the results an echo? Or are the result having something making a ghost? Radars started as a theory. Experiments were done in a relative controlled environment making it plausible the theory/idea could be put into practical use. With a working model the evolution quickly made giant leaps. They soon discovered real life situations could be playing a trick or two. Weaknesses were found it wasn't by any means perfect. The flaws could be exploited if you didn't want to be detected. That led to counter measures counter counter measures and a race between detection and avoiding it. A natural evolution - comparable to the natural evolution between pray and predator. Somehow using the best of the collection of knowledge and technology - quantum physics are showing properties that defies logic and everything known to man. Maybe Newtons Laws do apply. We observe an action getting a reaction. Maybe we think we have a controlled environment but we're missing out on something. We think we've emptied the hose - but there's something that acts like a full hose. We know we put something into the system. We can detect it being put in but what we observe is a full hose pushing something out the "other end". You get two representations the one entering the system and the one leaving. But only measuring and looking for the one entering the sheer speed of the actions illudes the point of observation and the observer. Anything travelling at the speed of light will gain an incredible inertia - Einstein talked about bending the fabric of space and time. The travel of light is a constant you can't exceed. The bending of the fabric of space gives a new paradox. If the weight contracts space - the distance of travel becomes shorter - meaning it's possible to create a shortcut. Just for argumentets sake. If it creates a wave in space but only has to travel from top to top. From the observers point of view you have an experiment running close to the speed of light, you can observe at the speed of light - the reason for doing it to get the action as it happens. You get a picture of the moment in time when action takes place. However creating a wave in space going in a direction you can predict. You should see something where it's predicted. However if it's skipping the waves it's travelling faster than the speed of light. That would be like turning back time. Pumping water through a pipe - you can create a wavecrest travelling faster than the actual speed of the water pumped into the system. AKA the particle behaves like a wavecrest travelling faster than the actual speed it was put into the system with.If the wavecrest can travel four times faster. You slow the experiment down by a quarter - but record the action in real time - would you be getting a line of trajectory of where the particle where and a dot where the particle is in reality? Please forgive me for using the incorrect terms and probably getting something wrong in the understanding of the principles behind it all. I'm a layman trying to get an understanding using the knowledge I've got as a layman.

[@josephwilkins1221]

😊😊😊

[@almontez9929]

If you area layman, I'm a blind aviat or.

[@DisEnchantedPersons]

Physics doesn't breakdown,the human mind does.

[@glasshalfempty1984]

Physics doesn't break down, my car does.

[@sabatino1977]

For anyone who's interested, the song that starts at 24:08 is "The Liquid Lounge - David O'Brien - Jazzy Trip Hop"

[@shavoshaco2402]

The thing about measuring things on a quantum level is that you cannot observe anything that small without affecting what you're observing. This is why I believe you cannot measure everything about a particle on a quantum scale, if you measure it's speed it's position becomes obscured, and vice versa. We all exert gravity on everything around us being that we're made of mass, there are other fields too, but that's one that obviously can have an impact on a quantum level. I don't think it's really that mysterious as many people make it sound, because on a level that small we cannot make equipment capable of observing a particle that small without our also influencing it, because we're literally talking about on the scale smaller than a hydrogen atom. At scales that small how can you measure quantum particles without also fucking with them, I don't think it possible at least with current technology.

[@grahamwaring494]

Very interesting, agree we need more, KZbin should follow this type of program more

[@Riogrande1964]

Excellent use of analogies to convey concepts

[@alhamilton7261]

Well done Jim, my students (and I) enjoy your work, thanks...

[@AppliedCryogenics]

The wide penumbra of a shadow on a sunny day isn't indicative of the wave nature of light. It's mostly due to the situation that the sun isn't a point-source.

[@TheM0JEC]

Someone did once suggest that there was only ever 1 electron and it was travelling everywhere all at once and at all points in time, effectively with infinite speed.

[@schmetterling4477]

Somebody also suggested that Trump was the best president, ever. So much for what people are suggesting. ;-)

[@mineduck3050]

It doesnt break down, it's just that the methods of getting facts is so back engineered by necessity that its like putting a puzzle together in the dark with no picture. We could really use some abstract fundamentals that define existence at a base. Until then, you will quickly lose a mental oicture of what is happening physically. The basic is that all anything is, is motion. Matter is motion with motion barriers. This motion exists in polarized, internal volume that is equally as much volume as outside of the matter in question. In the quantum view, where our light is too big and slow to penetrate, its still just basic motions making form, except its very fast and lots and lots of time go by if you were in a relative refrence frame and perspective of observation. We are watching perhaps countless years of motion in one second of atomic observations, if we were to have a time keeper in realtive size and velocity counting the moments alongside us up here. Its all motion. Get the abstarct truths of motion and form into the theories, and things will smooth out considerably.

[@sunbeam9222]

👍