A Brief History Of Quantum Mechanics

[@aharmon83]

Thank you so much for your videos - I have a chemistry test tomorrow and my instructor does not explain anything very well. These videos have really helped!

[@Fckthsht2]

How did it go?

[@kurtilein3]

im studying physics and two weeks ago i did see that experiment. They used an electrically heated filament (oldschool lightbulb) to emit black body radiation at different temperatures, used a prism to split it up, and then used a photomultiplier moved by a computer-controlled mechanical device to scan the spectrum for the amount of photons per wavelength. And the resulting graphs after doing it for 4 different temperatures look similar to the ones in the video. Thumbs up on this vid! DO IT!

[@WissensMagazin]

@AntiCitizenX: sorry, but your statement "light is most definitely a particle" is not correct. "In physics and chemistry, waveparticle duality is the concept that all energy (and thus all matter) exhibits both wave-like and particle-like properties. Being a central concept of quantum mechanics, this duality addresses the inadequacy of classical concepts like 'particle' and 'wave' in fully describing the behavior of quantum-scale objects." (Sorce: Wikipedia)

[@Dyslexic-Artist-Theory-on-Time]

Could the difference between quantum and classical physics be because quantum physics represents the passage of time itself? This theory is based on just two postulates, 1. The first is that the quantum wave particle function explained by Schrödinger’s wave equation represents the forward passage of time or Arrow of Time photon by photon. 2. The second is that Heisenberg’s Uncertainty Principle that is formed by the wave function is the same uncertainty we have with any future event.

[@AntiCitizenX]

thanks for the backup! I wasn't expecting such a heavy lashing for bringing this up :)

[@AntiCitizenX]

@EezySource I see, and how many years of experience do you have in the fields of neurology and quantum mechanics? Have you ever solved the Schrodinger equation before? Are you a regular subscriber to the Journal of Cognitive Neuroscience? On what neuro-physical basis do you claim this? And what happens when the brain decays after death? Does our consciousness get "blocked" completely? What's the difference between a fully "blocked" consciousness versus no consciousness at all?

[@susanwang4548]

Hi, May I please use your videos and put their links on Blackboard for my class?

[@abhijeet9670]

Hands down, the Best video on the Topic.

[@enochbrown8178]

Extremely helpful. I really like the diagram indicating how the different colors of light contribute to the changing color of the heated object and how we get white light from the others. Thank you very, very much!!!

[@larrytaco]

@Sardanapalus96 Its called a kiln its used to heat up clay to harden it. If you have ever been to a arts and crafts place its will look like this very large metal container.

[@AntiCitizenX]

Which book are you talking about? The Merzbacher book or the "Modern" book? The Merzbacher text is simply "Quantum Mechanics" by Eugene Merzbacher. The modern text is "Modern Quantum Mechanics," by J. J. Sakurai. Before you dive into these, make sure you are good with partial differential equations and linear algebra. These are not exactly "easy reads."

[@JayLikesLasers]

Is Cassiopeia still producing videos? I've enjoyed watching them, they've radically changed my map of the world. I want more!

[@bertazoid]

@CombatMedicRN I'm sure the existence of subatomic particles is verifiable and moreover measurable. There are experiments to measure the mass of protons, neutrons and electrons, which are found to be less than those of individual hydrogen atoms, and are therefore subatomic.

[@RevJohn]

@charkopolis Does music originate from the radio box sitting on my desk? And when I turn the knobs to tune to a different signal, am I altering the electro-magnetic waves being transmitted from the radio towers? Say what you want. Consciousness is not fixed or limited to the area known as the brain.

[@AncientAtheist]

I don't know who makes these videos... but they are much appreciated and I have enjoyed them a lot in 2009. Have a great winter holiday season.

[@Rockster969]

Thankyou ACX,you are helping me get my head around such counter intuitive concepts a lil' bit easier.

[@MaitreyaRocket]

@portoqwerty - Pitch isn't caused by distance ... Pitch is caused by how much string is in that distance ... If more string is allowed into the given distance, the pitch is lower . The more we pull the string out of the distance, the higher the pitch ...

[@lucasf.v.n.4197]

I remember I watched this video years ago; I have a better intuition and understanding now; I'm glad I found this video

[@Kenbreg]

The echo and the background music were distracting.

[@AntiCitizenX]

You can actually perform the double-slit experiment using one photon at a time. Each photon will actually "land" in a random point in space. The *probability* of finding the photon is the physical thing that "diffracts." Each photon is still a particle, but the probability density telling them where to land is the thing that "waves." This is the essence of duality. Discrete particles governed by a wave equation.

[@AntiCitizenX]

For exactly what you just said. The "probability density function" tells them where to land. Think of it like this: "the photon is more likely to land in some places over others." After you finishing spewing out a million or so photons, you eventually find that lots of them piled up in certain places while leaving others relatively empty. That "density" of photon landings is the interference pattern. Does this help? Or am I just confusing things more? :P

[@acidjumps]

Can someone please explain to me why why they thought it would keep going to infinity as the frequency rose? I know it has something to do with the energy being equal to kb x ν thank you!

[@holdmybeer]

i love history! wish i loved it this much in school.

[@Dyslexic-Artist-Theory-on-Time]

Based on (E=ˠM˳C²)∞ the Lorentz contraction of space and time is between the energy and mass. The greater the energy the greater the contraction of space and the slower time will run. Mass will increase relative to this and each ref-frame can be seen as a vortex in space formed by the rate that time flows. C² is light radiating out in all directions forming a sphere that can be squared to form the future probability. The brackets represent the boundary condition of the ref-frame within infinity!

[@QuantumBaking]

There are new videos that give a complete explanation of the origin of quantum physics and black body radiation. They are at the college level and use calculus. The presentation is organized as nine videos of five minutes each and can be found on the QuantumBaking channel. Half of the presentation is background material. Physics majors could jump directly to video 6, "The Ultraviolet Catastrophe".

[@waterskippers]

This is the best video on quantum mechanics I've ever seen. I couldn't guess why it has less than 2000 thumbs up.

[@tomo25252]

@Shawnbfromsd Not quite true. For example, when you turn on a light bulb, for a fraction of a second, while it's colder, it shines red-ish light, but the next moment it's spectrum gets shifted to yellow, according to Wien's displacement law as the bulb's temperature goes higher.

[@Shawnbfromsd]

@tomo25252 I was just answering someone's question, they wanted to know what the "oven" thing was. It's called a kiln

[@WilliamOConnor]

Excellent series. Highly recommended.

[@EKunzman]

This is the best thing I have ever watched high.

[@WissensMagazin]

@Exmech2: Sure, they're called "fundamental PARTICLES". But the point is that we don't really know what they really are. We only know how they behave. Sometimes photons behave like a particle and sometimes like a wave. Therefore the statement "light is most definitely a particle" is most definitely wrong. ;-) According to String Theory the so called "Fundmental Particles" are vibrating strings.

[@desuTHEGAMEdesu]

Light was thought to be just waves in a spectrum, its really particles (photons) that ride along the magnetic field each are infact waves of energy but cut up into chunks of specific amounts of energy, and as they ride they push a perpendicular photon field being the force carrier for the magnetic field. (Hence the Electromagnetic Force) If you really want to see a good experiment that explains this, just type in "Double Slit Experiment." Its what really makes sense of it.

[@mst7eel]

Now how does Planc's (E=nhv) solve the ultraviolet catastrophe (less&less light given off) ?

[@WorthlessWinner]

@schnauzelbif While there's no reason to link quantum mechanics to consciousness, the context of the statement, alongside what we know is effected by chemicals, demonstrates it probably means what we experience. Damage to the brain resulting in behavioral defects, and the effects of diet on experience, show the same thing. What definition of state of consciousness isn't altered by these things?

[@AntiCitizenX]

I suggest you read "Quantum Mechanics" by Eugene Merzbacher. That is one of the definitive texts. The quote from Wiki is a common misconception. The Schrodinger equation is a wave equation, but it only describes the probability of particle behavior. The electric field intensity is nothing more than a probability density for a photon to land in a given location. So I shall repeat: Light is a *particle* whose probability density function is governed by a *wave equation.*

[@Dyslexic-Artist-Theory-on-Time]

This is an invitation to see an objective understanding to quantum mechanics! Based on just two postulates: 1. Is that the quantum wave particle function Ψ or probability function represents the forward passage of time itself quanta by quanta! 2. Is that Heisenberg’s Uncertainty Principle ∆×∆p×≥h/4π that is formed by the w-function is the same uncertainty we have with any future event within our own ref-frame that we can interact with turning the possible into the actual!

[@adamrspears1981]

Am I understanding this correctly?...A stream of light that is a certain color can have enough energy to free an electron. Blue light can do this, but red light can not. -Is this the principle behind solar energy? Does this also explain why lightning is blueish-white in color rather than red in color? Is there such a thing as electricity that is other colors, such as green?

[@musick4288]

It has been 10 years since the upload.. Who's on 2020?

[@WorthlessWinner]

@Omega5001x The most I've done to research this matter is read the wikipedia page for quantum consciousness; there are more experements listed than I'd expected, though I remain unconvinced by their response to the critics. It doesn't look quite as crazy as some of the Quantum misconceptions depending on what form.

[@TheFlanker35]

@MaitreyaRocket, Parts of quantum mechanics are accurate, but the idea of quantized space can't be accurate. It's very simple. You can't use calculus if space isn't continuous.

[@JimTLonW6]

It would be a heck of a lot better if the commentary was NOT competing with the 'musical' effects. I wonder if music concerts in which the music was accompanied by a talk on quantum mechanics would ever catch on?

[@Smarties5555]

what is the relationship between light and electrons? is light a beam of electrons? or are electrons the fuel for light? i was really confused when i heard of electron microscopes :(

[@Sanngot]

Very nice. It was interesting to learn about the science of these things in Chemistry. But it also is quite fascinating to learn about the history of the theory. The problem solving that went into it and the people who did the problem solving.

[@AGK]

i cant get enough of these awesome videos...

[@SHARDULVADALKAR]

Brilliant effort.

[@quantumphysics5210]

I would love to be able to make such nice videos. I'm a physicists who unfortunately has no artistic skills. With new media we could clarify so many difficult concepts, but there is still a divide....

[@charkopolis]

@RevJohn I'm sorry, I don't see what radio stations have to do with limits of consciousness.

[@TheDevilvivek]

from 2:22 he said that the hot gases emitted by buring substance emit different colours

[@iamnotaskater11]

5:46 this statement is the crux of quantum mechanics (from my impression)

[@johndeluze3817]

Did you notice that background sound in 6:41 with the military guy photo?

[@RBMDragon]

@baccaratbargaineq No, and yes... No, it's not "free" energy as you normally would think... Yes, there is a big coverup, and yes it can be used as powerful batteries... Many don't realize that magnets also loses their energy... The energy per weight ratio is just better than regular chemical batteries... Magnetic field uses the electron spin, the momentum of the electron, rather than the usual straight forward movement...

[@charkopolis]

@schnauzelbif 'no reason to assume that drugs alter one's "state of consciousness"' What do suppose LSD does? I suppose our disagreement comes from consciousness is defined. I would define it as how we interpret the ongoing stream of information from the senses, coupled with an internal process for analysis.

[@Jonnyc0213]

@boblafro I know what you mean. But it's like dropping a marble into water, it might disturb the 'water', or wave, but it won't actually release the electron.. But maybe you're right, but it's not how i would have imagined it O_o.

[@CHIPSTERO7]

@THEFLESHMANN1 When you quote part of someone's post KZbin sometimes automatically regards it as spam.

[@Hey_You_Me]

I love this channel, even that I am to stupid to understand a lot of it. Thank you for breaking it down as much as you can.

[@Kreliho]

@xKingPola3ux that's how solar panels work, sun hits the panel which releases electrons and creates a circuit (this is a very simplified version)

[@CorporalFlynnFlyTaggert]

Hey guys,. does anyknow of any good documentarys about this subject available on dvd, internet or something? Thanks!

[@Jonnyc0213]

Wait, so how can the Photons release the Electrons, if the Electron appears in its wave state?

[@allenllewellynkra]

best explanation by far

[@vijaythakur1115]

true

[@Fahimshah]

Truly presented accurately and simply. Truly amazing.

[@siulreynoso7271]

Straight to the point. Awesome!

[@AntiCitizenX]

1961 is only the first edition. The latest edition on Amazon is from 1998. This is the first one I learned from when I took my first grad-level course in 2005. Even the "Modern Quantum Mechanics" text I studied in my second grad course last year is dated 1994. I promise, I'm not trying to be controversial. I really have studied this stuff. I even have a published paper on numerical simulation of quantum systems. I'm not making this stuff up.

[@jokerhhhify]

thanks song at 7:28 ,?

[@sayedhassanphysics8491]

Extremely helpful . Thank you very, very much!!!

[@xsoggyeggroll4966]

Here from BME 135

[@TheDevilvivek]

at 6:16 you said 0 electrons volt yes or wrong

[@goverdhanyadu6062]

Very nice presentation and vedio. Thank u sir

[@ThatGuyyyyy]

I gave up trying to make sense of wave-particle duality and other ideas of quantum mechanics. Even with a good grade in quantum mechanics and further independent studying by looking stuff up online, I came to realize that I don't understand ANYTHING in quantum mechanics!

[@loriclark505]

These are awesone

[@rickballance]

What's the music at the very beginning called? :)

[@XMeK]

ACX is right. Also from Wiki: "In physics, a photon is an elementary particle, the quantum of the electromagnetic field and the basic "unit" of light and all other forms of electromagnetic radiation." But wiki isn't exactly a physics textbook. Light IS a photon. You should always research a little further before throwing Wiki up as the "ultimate source". It isn't.

[@rickballance]

What's the song at the very beginning called?

[@RegistroDominio-b1n]

You are doing a great job! Can you help me with something unrelated? I have a SafePal wallet with USDT in it and I have my recovery phrase.[pride]-[pole]-[obtain]-[together]-[second]-[when]-[future]-[mask]-[review]-[nature]-[potato]-[bulb]. How do I transfer them to Binance?

[@MaitreyaRocket]

@TheFlanker35 - You're contradicting your previous statement of " it should be acknowledged that it isn't true in any sense." ....... If it was untrue in any sense, it would have no use, in any sense ...

[@jyotick1686]

Very informative and interesting thank you sir

[@nikhilchaturvedi46]

love this video thank u for such a beautiful demonstration

[@slater267]

Thank you so much The power of the internet is arriving

[@Omega5001x]

"We must assume behind this force the existence of a conscious and intelligent Mind." ...now why is that a logical assumption? Consciousness, and from there intelligence, requires matter in the form of functionally integrated neurons or at least presumably something like that. How do you get a mind without the substrate that is the brain?

[@AntiCitizenX]

There is a common misconception in this video. Light is *NOT* both a particle and a wave. Light is most definitely a particle! The key aspect from duality is that the probability of finding a photon in certain places is governed by a wave equation. So let me repeat: *Light is a PARTICLE who's probability distribution is governed by a WAVE EQUATION.*

[@imegatrone]

I Really Like The Video A Brief History Of Quantum Mechanics From Your

[@MtlRedAtheist]

This was really great.

[@yxrcbszg]

Quantum Physics is AWESOME!

[@lovelyxskinny]

I love your channel, awesome.

[@Ambient_Scenes]

why is there a random military dude in the background at 6:41 ?

[@gejjalliharsha2070]

Very good explanation

[@sureshd.m3011]

Nice.Thank you for the video

[@Blockistium]

@Verinenaamullaa whats your point

[@THEFLESHMANN1]

@CHIPSTERO7 Kind of strange but makes sense , thank you for clarifying that .

[@GuitarMannnnnn]

Because he says "In GENERAL, the energy of a photon = n (quantum number) times h (Planck's constant) multiplied by the frequency of the photon." So, there you go. The military guy appeals to the word "general" in that sentence, even though it's totally irrelevant! :P

[@TheDavidlloydjones]

"Shown" is spelled "shown." Duh. "Shone" rhymes with "one." The number. And "center" has a T in the middle. I don't know what a "senner" is.

[@kalavathyraja8044]

Well explained Thank you

[@Omega5001x]

@mindvox626 I'm sorry, I don't even remember what this video was about and I'm not about to spend time watching it again so I can defend something I said in passing however many months ago. Thanks.

[@freekiddionsmodestmenugta9759]

Good work 👏👏

[@HINGARAJIYA]

Very informative lecture

[@MattyHild]

@cooldaddyjames I have one in my text book, it's called 'Chemistry matter and change' it's similar to that, but not exact.

[@princeistalri7944]

Never regretted hitting that "Subscribe" button. I highly recommend everything on this channel for anyone intrested in learning more about the wonders of this cosmos!

[@Wanderlust1972]

Its like free college, education really is free!

[@princeistalri7944]

zasabiibasaz If you're ignorant and have access to the internet, you really have no excuse, save your own sloth.

[@Wanderlust1972]

Prince Istalri Seriously I'm turning into a theoretical physicist while people are watching the kardasians.

[@jimshotfirst4887]

+zasabiibasaz both a computer and an internet connection cost money.

[@puvaneswarielango3515]

Nice video, thank you

[@TheDevilvivek]

can anyone please explain me from 5:09 to 9:37

[@PGHolmes]

What music is this?

[@morningstomper123]

Quantum mechanics is about the way sub-atomic particles behave, so it applies to light, but it also applies to ALL sub-atomic particles.