Particle Physics 1: Introduction

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DrPhysicsA

DrPhysicsA

Күн бұрын

Пікірлер: 418
@mikestoneadfjgs
@mikestoneadfjgs 9 жыл бұрын
I have been utilizing this channel for many months now in an attempt to better understand the universe around me and I HAVE to say that is the greatest source of information i have ever encountered in regards to truly understand the formalism behind the some of greatest milestones in physics. Im eternally grateful. Thank you.
@kjpmi
@kjpmi 9 жыл бұрын
I agree with you. I'm doing the same. It's a cool feeling when you puzzle a concept out for a while and suddenly it clicks and you all of a sudden "get it." Since I was a little kid I have questioned everything. No explanation was every really good enough lol. It's amazing watching these videos and actually getting a pretty good understanding of the fundamentals of reality INSTEAD of the pretty poor dumbed down explanations one usually gets.
@ahmettekin1616
@ahmettekin1616 7 жыл бұрын
Geronimo Cornplante
@joekaufman1874
@joekaufman1874 7 жыл бұрын
agreed!
@AL-jg8pv
@AL-jg8pv 7 жыл бұрын
lolz
@Yatukih_001
@Yatukih_001 7 жыл бұрын
Jupiter he´s just trying to tell us how small an antifa´s brain is.
@RudolfKlusal
@RudolfKlusal 11 жыл бұрын
This is the greatest "non-proffesional" lecture to particle physics I have ever seen. Great work!
@ZeroG
@ZeroG 10 жыл бұрын
Seems quite professional to me.
@AkamiChannel
@AkamiChannel 5 жыл бұрын
I think he’s a professor at Nottingham University. Brady, who is behind the Periodic Videos channel also has a channel on physics and you can see this guy explaining stuff (same voice)
@Quantum-
@Quantum- 4 жыл бұрын
@@AkamiChannel this isn't the same guy you're thinking of. This guy's name is Bob Eagle. He's not a professor. He's actually a radio host, singer, contributor to the field of physics. Just a jack of all trades, really. He just happens to sound a lot like Dr Mike.
@heavennoes
@heavennoes 3 жыл бұрын
@@Quantum- I thought he had a doctorate in nuclear physics at king college?
@Quantum-
@Quantum- 3 жыл бұрын
@@heavennoes he does. But he's not a professor. He is more like Brian Mays (I think that's his name) from queen. He has a PhD and has published papers, etc. But has pursued several different career opportunities outside of physics.
@channagirijagadish1201
@channagirijagadish1201 4 жыл бұрын
Clearly, one of the best lectures on Particle Physics. Before taking a course on physics, it is best to start here to get the foundations right. Thanks, DrPhysicsA
@DrPhysicsA
@DrPhysicsA 11 жыл бұрын
I'm really just trying to illustrate the principles here without getting too bogged down in the maths. You could argue that we are talking about a particle having a particular value of K such that K is zero for all values apart from the specific value associated with the particle.
@UrbanChaos30
@UrbanChaos30 11 жыл бұрын
This stuff is ridiculously simple. You're a very good teacher.
@rileystewart9165
@rileystewart9165 2 жыл бұрын
Don't shrink his head's wavelength.
@trulucy
@trulucy 5 жыл бұрын
Admittedly, I only completed high school and am now a middle-aged man here in the US and am familiar with basic math but I find learning about physics topics very interesting. This is the third video of yours I’ve watched so far and for me you explain these things very very well and I like that you write it all out and say it in plain terms. Wikipedia helps me a lot. Thanks for making these videos and I’m glad to be a new subscriber of yours in February 2019.
@DrPhysicsA
@DrPhysicsA 10 жыл бұрын
Best route to become theoretical physicist, get initial degree and post-graduate degree and then seek a university research post.
@STDrepository
@STDrepository 9 жыл бұрын
What if we just want to learn about particle physics for fun?
@DrPhysicsA
@DrPhysicsA 9 жыл бұрын
Silas Panelo Sadia Like most things, the jobs are highly competitive.
@STDrepository
@STDrepository 9 жыл бұрын
Silas Panelo Sadia But I don't want to be a theoretical physicist.
@blakops000007
@blakops000007 9 жыл бұрын
well i think a better way is after you gaduate you take courses in advanced mathmatics and modern mathmatical theorems it can really help you put your thoughts in equasions
@billchristie5644
@billchristie5644 9 жыл бұрын
DrPhysicsA I agree. My story is weird. I loved physics and architecture - like to draw and resolve. I encountered relativity and said I will never understand it intuitively. I explored the macro to micro sciences with analogies. Then in architecture I heard it for the first time - get outside the box - get uncomfortable - be aware of what you are dealing with. Suddenly the world was full of mystery and we have the power to look for the clues. I carried on with architecture, but that's when I realized that a rotating wave made up the electron (fermion) and explained relativity, etc inherently. Not de Broglie's pilot wave, but matter itself was a manifestation of the rotating wave. I'm a private entrepreneur and proud of it, but I will try to learn everything I can while I'm here. Going over these lectures is a great privilege. One must know the laws in detail in order to ask the right questions. Thanks so much. Bill Christie
@sihanchen1331
@sihanchen1331 9 жыл бұрын
Your pronunciation is charming! I love it !
@Dogboy73
@Dogboy73 8 жыл бұрын
Very strange. I was watching a video on KZbin in bed. I eventually fell asleep & I guess when the video I was watching ended it somehow went into this one. I awoke in the early hours of the morning 45 minutes into part 2. I had a good couple of hours dream time physics lessons! Even stranger is that I remember the dream comprising entirely of this video's audio. The dream was visualized by a series of parallel washing lines running criss-cross. The washing lines were in rows of 10 & along each line ran a colored square (about 10 cm's across) that represented numbers & moved along in such a way as to illustrate calculations. Weirdest fucking dream I've had a for a long time!! Before going to bed I'd just completed a bottle of red wine. I went for a little lie down as I was feeling a bit worse for ware. 2 hours later I awoke from my dream completely & utterly perplexed but now with a firm grasp of particle physics. Amazing. I wonder what I will dream about tonight?!
@dinomonaco2665
@dinomonaco2665 6 жыл бұрын
Dogboy73 I
@reddevil9554
@reddevil9554 6 жыл бұрын
Well, as long as no-one's watching you, an interference pattern. :D
@darrenbrad1721
@darrenbrad1721 5 жыл бұрын
Yeah dont believe a word of that.nice story tho.maybe tonight you will dream up another fake story
@darrenbrad1721
@darrenbrad1721 5 жыл бұрын
Completed a bottle of wine. Really, completed. Hahahahahahahah
@ahmedayaz6685
@ahmedayaz6685 10 жыл бұрын
your lectures are simpler than leonard susskinds lectures great job Sir
@gwho
@gwho 10 жыл бұрын
most definitely. I don't see why it has to be so complicated. Any concept can be made easier taught. Most people put up a hissy fuss when this is pointed out because usually they're not incentivized to put in the effort to research and refine their presentation. They can afford to put the onus on the student/customer citing laziness, shame, and ego. Those that do and can grasp it via the less intelligible way, don't complain, and in fact boast about it because it becomes a differentiating factor, they can hold it over others, and it's the accepted social climate aligned with the authority figure's preferences. I say fuck that I'll compete teach better, and reward those who do the same in the free market.
@universalsailor
@universalsailor 10 жыл бұрын
gwho You are absolutely right about this. In fact, the situation is worse. Many science academics deliberately treat their subjects as repositories of holy writ to which they have been admitted but which must not admit others. They conceive their job as gatekeepers rather than popularizers , as if passing knowledge on will in some way lessen their own kudos. Typically, they try to mystify the material as much as possibl and talk in impenetrable jargon to help them do this, so we all know who's playing that game. These people should be flagged up, denounced and disincentivized ASAP. And all praise to guys like DrPhysics for going the exact opposite. He is a great teacher, with all the right instincts and a very amicable manner. If anyone should get an OBE it's him.
@gwho
@gwho 10 жыл бұрын
intentionally obfuscate it, or refuse to teach it simpler, supposedly to filter people out. I mean, i get the Flynn effect is there too, but it's not the only way.
@globaldigitaldirectsubsidi4493
@globaldigitaldirectsubsidi4493 5 жыл бұрын
susskind is harder, more compressed, it is just a higher level and not for beginners.
@waynelast1685
@waynelast1685 4 жыл бұрын
Global Digital Direct Subsidiarity Democracy yes and no. Some of the subjects are a bit deeper but they are over complicated in my opinion.
@DrPhysicsA
@DrPhysicsA 11 жыл бұрын
Jim Dogma has kindly responded. I'll just add that this is consequence of taking the derivative of an exponential. So d/dt of e^iwt = iw e^iwt
@capefear56
@capefear56 11 жыл бұрын
Aspiring high school student here. Thanks a lot for the comprehensive introduction. Will be aiming to base my career in this extraordinary field.
@Gismho
@Gismho 3 жыл бұрын
And yet another EXCELLENT video. Thank you! You have a unique skill in lecturing/teaching. No wonder you've got hundreds of thousands of "views".
@pankajnegi9795
@pankajnegi9795 8 жыл бұрын
I cant thank you enough for these videos...they are really the best on youtube in the way you explain things.... hope you are doing okay and looking forward to new videos
@hidendiamond
@hidendiamond 10 жыл бұрын
recently had my mind blown when i learned that, strictly speaking, "particles" are not really particles as one might normally envision them and "fields" are not really fields. i still plan to educate myself via your vids, but it is a strange new world for me having learned these things. very excited to have found the "Einstein Field Equations for beginners" vid. being able to push pause at anytime in order to think carefully about what is being said will enable me to get further with physics then if i was sitting in a lecture hall. thanks for the fascinating uploads DrPhysicsA!
@noracorbella1354
@noracorbella1354 7 жыл бұрын
OMG i recently found your channel and I love it! You explain everything so well.
@petertravere5080
@petertravere5080 10 жыл бұрын
i wish I had a tutor like this - HE IS GOOD!!!
@miguelmouta
@miguelmouta 9 жыл бұрын
This series is a prime of didactics and deepness, for the advanced concepts explained in rational sequence. I shared this video on facebook with my friends ( biomedical researchers in great part ) .Best wishes from Rio.
@utkarshpande11
@utkarshpande11 11 жыл бұрын
hello professor. Thank you for the very lucid explanations of these concepts. Only the one who knows thoroughly can explain so easily. Einstein I think is supposed to ahve said "if the solution is very simple, god is answering". thanks sir.
@Goodzboss
@Goodzboss 10 жыл бұрын
Thank you so much DrPhysics. This is an amazing representation for some one like me [Who has an interest in GUT and particle physics, and general physics to boot] I have never had any opportunity to study this type of thing , so I do so in my own time.[ I dropped out of school thinking it wasnt getting me anywhere] now im 33 and have a keen interest on these topics. People like you help people like me realise thier dreams [and kick themselves for not pursuing university studies, when the opportunity was there]. If any one knows of some where online I can study/ learn particle physics [with a bit more detail, and at a pace I can work through] I would be very appreciative. Again DrPhysics the time and effort you have put into this video [first one of yours i found/ am yet to get to the others] is phenomenal. I really appreciate it
@mohammadharisfahim6614
@mohammadharisfahim6614 6 жыл бұрын
U r best. I am a physics lover who never made it to actually becoming a scientist. I salute your passion and effort. Keep it up.
@Sena_608
@Sena_608 3 жыл бұрын
You are a wonderful teacher. I think I understand most of the content as a high school student. I will definitely watch all of your videos.
@kelpdock8913
@kelpdock8913 4 жыл бұрын
incredible how much can be explained with a felt tip pen and voice
@R0UTARAN
@R0UTARAN 11 жыл бұрын
This is just great! I'm a computer programmer and my math background is just introductory calculus (and that was a long time ago) but all of this stuff is still very easy to follow. I always wanted to have more detail, see a little more math behind the ideas presented by physicists in popular science talks and this stuff fits the bill perfectly. Thank you so much and please keep up the great work!
@andykopfleck
@andykopfleck 11 жыл бұрын
Dr.Physics...Chapeau! Your channel conveys the profound knowledge of Natural Philosophy in a simple and efficient manner. Keep it up! :)
@hkhj139
@hkhj139 3 жыл бұрын
Great teacher! now physics seems really different after listening and watching your lectures... thank you so much may Allah bless you and your entire life and family sir! its such remarkable work you are doing for free... it's like talking classes in Oxford university!
@dijonstreak
@dijonstreak 3 жыл бұрын
awesome. best yet. !! every dark cloud is going away and FINALLY seeing the gist of the whole matter...thanks to YOU. ..greatly appreciated.....!!
@DrPhysicsA
@DrPhysicsA 11 жыл бұрын
Keep watching this series. It will appear in a later video.
@jaykemm3472
@jaykemm3472 3 жыл бұрын
Did this at a party last week. Huge hit. Thanks.
@MisterBananaMan365
@MisterBananaMan365 10 жыл бұрын
Im just starting physics but I absolutely understand everything!!
@heavennoes
@heavennoes 3 жыл бұрын
ik, I'm 10 and he is the only person / Ytuber the explains it properly!
@iconsumedmt1350
@iconsumedmt1350 6 жыл бұрын
I think I finally found a perfect channel to help me pursue physics
@RagHelen
@RagHelen 9 жыл бұрын
This video is wonderful! It closes a the gaps I didn't understand in other introductions.
@preeam108
@preeam108 10 жыл бұрын
Great job man ! This is your first video that I am watching but guess I should get back to the QUANTUM MECHANICS ONCEPTS first. But really apreciate your efforts as I am a massive physics enthusiast. Keep up the good work, it is the efforts of passionate people like you that keep us physics enthusiasts' curiosity alive and breathing !!!
@tim40gabby25
@tim40gabby25 Жыл бұрын
Wonderfully concise. Barely a word wasted.
@DrPhysicsA
@DrPhysicsA 11 жыл бұрын
a- As an operator will take a basic state and annihilate it to create a vacuum. But if that state is in a high energy state then a- will simply reduce its energy state. Similarly a+ will create a basic state from the vacuum or increase the energy level if there is already a state there.
@alvarogarciazamarriego488
@alvarogarciazamarriego488 10 жыл бұрын
You are the only God I believe in, sir. You are absolutely amazing. I wish I could ever have your intelligence. Thank you so much for these videos.
@JimmyGray
@JimmyGray 10 жыл бұрын
To whom it may concern. Because of teaching styles if you watch these videos on creation and annihilation operators and then watch professor Susskind's Stanford videos afterwards on introductory particle physics which also talks about the c and a operators they complement each other nicely. Block off 3 to 4 hours of time as i found it better to watch them both around same time.
@MrOvipare
@MrOvipare 8 жыл бұрын
This serves as a really smooth introduction to QFT! Thank you! I started to read a book about QFT but it got really overwhelming pretty quickly...
@adamfattal9602
@adamfattal9602 2 жыл бұрын
"QFT for the Gifted Amateur" seems to be a relatively slow and steady one. Although you posted this 6 years ago so you probably got that covered lol
@DavidTJames-yq9dr
@DavidTJames-yq9dr 4 жыл бұрын
I was really able to absorbe the vast majority of this. There are some formulas and effects that you speed thru and/or reference, but a bit of wikiGoogle'ing has covered those gaps. I am new to your series - breadcrumbing and reverse viewing as per your references - and look forward to rekindling my youthful love of math and physics at the atomic and quantum levels. Thank you so much for all this hard work and tsking the time to articulate. I believe I would have excelled better in my early academics had I found someone to explain these topics as you have. Consuming all of your vidoes will be my goal for this season. Cheers &much respects. Dave.
@Urdatorn
@Urdatorn 4 жыл бұрын
Oldie but goldie! Derivation of TDSE was brilliant.
@Humans-007
@Humans-007 Жыл бұрын
There is so much information on KZbin. You can literally learn anything if you want
@ZeroG
@ZeroG 10 жыл бұрын
Thank you for posting these no-nonsense vids and not dumbing them down. I believe the biggest problem in society is the "lowest-common-denominator" approach that plagues education, news reporting, public discourse, etc. That approach has led us to a milieu in which it has become a tacit crime to bring complex, fact-based analyses into arguments in the workplace, in government, in relationships, etc. People have actually started to act as though, by all appearances, they think they have the right not to have to address problems that can only be described using complex logic, mathematics, and/or scientific reasoning. It goes to show we must always struggle against the return to a dark age and you set the example of how this new technology ought to be used. Bravo sir!
@DrPhysicsA
@DrPhysicsA 11 жыл бұрын
Neither. This is simply saying that the more energy you borrow from the vacuum the quicker you have to repay it.
@Shukla_1729
@Shukla_1729 6 жыл бұрын
DrPhysicsA who provide the energy to vacuum? At absolute zero vacuum has absolutely no energy.what is your opinion about QFT, QCD at absolute zero? Will it not breakdown? If it breakdown then how you are so sure about it correctness? Do you know non-relativistic schrodinger quantum mechanics is absolutely correct at any pressure and temperatue?
@namrathagunnala4715
@namrathagunnala4715 5 жыл бұрын
You are so great you made me understand quantum field theory. Amazing! Keep doing what you're doing.
@heribertobarahona7695
@heribertobarahona7695 4 жыл бұрын
I have studied a little of Quantum Mechanics before, but I found this video of you very good. You explain very well! I'll continue seeing this series of you and other ones too:)
@Siralantoon
@Siralantoon 7 жыл бұрын
Wow I almost understood some of that. Thank you so much for this delicious presentation; equations so sweet you can almost taste them. Yum!
@TheShadow872
@TheShadow872 11 жыл бұрын
Awesome channel, this is the best channel for physics.
@GeoffBernard
@GeoffBernard 11 жыл бұрын
At first I though you were calling him a hat :) After a little research, I now know it's meant to say "hat's off to you with respect." I came here to learn physics and end up learning language. Chapeau!
@gibsonmaglasang
@gibsonmaglasang 7 жыл бұрын
Thank you very much, sir, for your passion in teaching these pieces of stuff! It immensely helped me in advancing my physics career and studies! Cheers!
@sanjayraoshedge8924
@sanjayraoshedge8924 9 жыл бұрын
i am understanding it ,step by step ! please carry on !
@rebokfleetfoot
@rebokfleetfoot 4 жыл бұрын
it's very well done, thank you for all your works
@yonathanberuk2074
@yonathanberuk2074 9 жыл бұрын
I love this, thank you and please don't stop.
@teklemariamtessema7410
@teklemariamtessema7410 6 жыл бұрын
Very interesting and can open eyes in sight of Particle physics
@pendalink
@pendalink 9 жыл бұрын
This is awesome! However if you could tell me what video series I should start with to understand everything, that'd be great
@DrPhysicsA
@DrPhysicsA 9 жыл бұрын
Depends where you are at. Go to playlists page and start with playlist for GCSE. That's the basic level. Then do the A level playlist. More advanced. Everything else is pretty much uni level and you can do those in any order, tho best to do QM before Particle Physics.
@pendalink
@pendalink 9 жыл бұрын
thank you :)
@DrPhysicsA
@DrPhysicsA 11 жыл бұрын
What exam board are you doing? What issues would you want covered?
@ranjitsarkar3126
@ranjitsarkar3126 3 жыл бұрын
I want the mathematics of string theory covered.
@coffeehawk
@coffeehawk 11 жыл бұрын
Thanks for the great lecture...if only all professors taught their classes at this level...
@rebokfleetfoot
@rebokfleetfoot 4 жыл бұрын
this is why theoretical physicists are either in school or retired. i thank goodness for them...
@Miho-hl9yx
@Miho-hl9yx 9 жыл бұрын
sir, your videos helps me very much on my studies on quantum mechanics!! thanks so much!
@fllev4121
@fllev4121 4 жыл бұрын
Thanks for the lecture! Weird that it has only garnered ~1% of likes, when most other presentations are usually at an average of 10% of likes. Must be that most people are afraid of thinking of the physical world from an analytical frame of mind or maybe they think that to "get physics" they have to get it from the "Tree of Knowledge ..."
@Jonosghost
@Jonosghost 10 жыл бұрын
It's going to take me a few times to watch this before it makes good sense to me but it is mostly a pleasure to watch. Susskind is brilliant sure but so far I haven't seen him hit the white board like Dr Physics Alpha. For all \-/ the "Analysis" one may study, there exist -_~| differential geometry such that : general relativity makes sense. Should one learn analysis before attempting to understand quantum mechanics and what subjects should one be clear about before general relativity? Is it best to learn the concepts in the same order that they were chronologically published? Or are there finite examples such that : it is better to learn quantum mechanics before relativity is true?
@anuragsikder3555
@anuragsikder3555 4 жыл бұрын
Basically each photon interacts with an electron. If the photon provides enough energy to the electrons to overcome the work function then the electron is ejected from the metal surface and the rest of the energy which is left after overcoming the work function is then converted to Kinetic energy.
@physictist
@physictist 10 жыл бұрын
At 1:04:25 you divided the left side for -(i omega) because it is independent of k but I think dividing the right side for (ik)^2 is not ok at all because it has the sum over k (the sigma term). Can you explain it for me?
@trfinl
@trfinl 7 жыл бұрын
this was a mistake -- he should have changed the k^2 -> omega*2m inside the summation sign -- then all would have worked out OK. It seemed to work in the video, but as you noticed it was an accident because you can't just take the k factor outside the summation (or the omega for that matter).
@natepepin09
@natepepin09 11 жыл бұрын
This really helps explain the integer values in those equations.
@riadhalrabeh3783
@riadhalrabeh3783 10 жыл бұрын
-Yet another magnificent lecturing by Dr PhysicsA. Very clear, up to the point and I recommend it for all students of the subject. I also wounder if it is possible to give a link (in new videos) to where one can find the list (links) to all the other lectures. -Away from this, I personally do not feel comfortable with many of the notions of QM- Like the one of 'borrowing energy'- even if it 'works'. I subscribe to Einstein saying that 'God does not play dice' and add to it 'and does not live on borrowed energy too'.I look for the day when better explanations are found.
@DrPhysicsA
@DrPhysicsA 10 жыл бұрын
Thanks. You can get up my playlists rom the you Tube main screen of my channel, or you can go to www.bobeagle.co.uk/drphysicsa.html for a complete listing of all videos.
@enochbrown8178
@enochbrown8178 5 жыл бұрын
OMG, is this man a teaching genius, or what? OMG OMG OMG !!!!!!!!!
@antonsl-y5696
@antonsl-y5696 8 жыл бұрын
Hello. Thank you very much for excellent videos! Quick question regarding the explanation at 13:24. If the cricket ball is moving at 100m/s, wouldnt the wave length be below the Planck length? And if so, wouldnt it imply that see the ball moving, so the movement which can be measured, but the wavelength is immeasurably small?
@behnamansari4704
@behnamansari4704 6 жыл бұрын
Best teacher ever. Thank you
@helmutalexanderrubiowilson6835
@helmutalexanderrubiowilson6835 3 жыл бұрын
this is old school teaching and i loveit thank you
@ne0ph0enix
@ne0ph0enix 10 жыл бұрын
Thank you for uploading it. Very interesting stuff. There is just one thing that is bugging me. In the last part where you obtained the TDSE it seems to me that the more general equation that is satisfied by the field is (in Latex): $ i^{m-n}\frac{d^{n}\Psi}{dt^{n}}=(-\frac{\hbar}{2m})^{n}k^{2n-m}\frac{d^{m}\Psi}{dx^{m}} $. Taken this into account, TDSE is the special case when m=2 and n=1, and the choice of m and n (the order of the derivatives in space and time, respectively) seems quite arbitrary. This choice could perhaps be linked to the dispersion relation.
@engdallal
@engdallal 11 жыл бұрын
Very easy to understand, yet advanced.
@CarlosNunez-uj9pe
@CarlosNunez-uj9pe 3 жыл бұрын
Excellent class, thanks a lot.
@Mancheguache
@Mancheguache 7 жыл бұрын
This man is a prophet of mathematics
@nicouxgwendal
@nicouxgwendal 11 жыл бұрын
Thanks for your answer. It will take some head scratching and some books reading before I fully understant it. But I have to say, particule physic is "passionnant" (yes I'm french) especially when explained the way you do in your videos.
@Thewerwolf
@Thewerwolf 4 жыл бұрын
Did Einstein perform the Photoelectric Effect experiment? I thought as a theoretical physicist he explained it and received a Nobel Prize for his contribution it is Max Planck that suggested that the energy carried by electromagnetic waves could only be released in "packets" of energy. There where other contributors to the PEE. Cheers!
@gwho
@gwho 10 жыл бұрын
Thank you soo much. I love your lectures.
@jimdogma1537
@jimdogma1537 11 жыл бұрын
Brilliant. Another enthralling chapter on our road to reality comprehension. I was especially titillated to see a reference to Fourier analysis, which I knew played some role here but didn't know exactly what. Can't wait for the next episode. Good job!
@sabanoor87
@sabanoor87 5 жыл бұрын
Excellent work
@adamfattal468
@adamfattal468 8 жыл бұрын
17:45 Are you just applying the Euler Formula to waves (and fields)?
@YoungColCol
@YoungColCol 9 жыл бұрын
At around 53:30 you spoke about how fields can have different wave shapes. With sound waves, we can appreciate different timbres which depend on the wave shape of the sound. Are there similarly different 'timbres' of light?
@kavishkakavishka8117
@kavishkakavishka8117 8 жыл бұрын
very strait forward explanation...thank u!
@juanmaminage
@juanmaminage 10 жыл бұрын
I enjoy so kuch with your videos..!
@rahulshaw8970
@rahulshaw8970 5 жыл бұрын
at 01:04:05, there is a mistake. The psi terms are all summations over k, hence only the terms inside the summation comparison wont be sufficient and it should not be divided by k_square. Instead if you directly replace omega with k_square/2m, it would give the same result.
@dipikadash5573
@dipikadash5573 5 жыл бұрын
Really a good video to correlate mathematics physically. I want to ask a question. What makes an excitation in the field, so that a particle is getting generated? What is the cause of field excitation? Please reply me. Thank you for your nice explanation.
@kjpmi
@kjpmi 9 жыл бұрын
DrPhysicsA I am in awe of your knowledge. I generally understand the concepts here (e.g. creation and annihilation operators) and the math is a bit sketchy for me in places, BUT, I wish I had the depth of knowledge and recall that you have. Are you writing all of these equations from memory? I'm sure the video follows an outline you thought up before filming but I get the impression that all of the equations and math are just flowing purely from memory. If so, that's amazing.
@EzraAChen
@EzraAChen 2 жыл бұрын
Thanks
@blakops000007
@blakops000007 9 жыл бұрын
don't say even I dr. :)) you are just as brilliant as the people you are talking about !!
@moisepom
@moisepom 9 жыл бұрын
great video. great pace.
@nan9849
@nan9849 6 жыл бұрын
What physical meaning the imaginary term isin(kx -wt) has in the expansion , e^i(kx - wt) -..........-(I)? The wave represented by (I) is a cosine wave only, right? Or the sine part has to do anything with this? I am extremely confused on what is the role of imaginary terms in waves as well as in Currents.
@vincentvanravesteijn9592
@vincentvanravesteijn9592 4 жыл бұрын
If the time evolution of a wave psi(x) would be written as: psi(x,t)=psi(x) cos(wt), then at certain times t the wave function would collapse completely and the particle would be gone (consider wt = pi/2, 3/2 pi, etc). Writing a wave like e^(iwt) would make sure that |psi(x,t)|^2 = |psi(x)|^2 at all times t.
@doubleirishdutchsandwich4740
@doubleirishdutchsandwich4740 7 жыл бұрын
Part 1: 185k views. Part 2: 45 views. Quitters!
@ilkov
@ilkov 6 жыл бұрын
More or less what happens also in physics classes
@AlchemistOfNirnroot
@AlchemistOfNirnroot 5 жыл бұрын
@@ilkov so true.
@kryall7637
@kryall7637 4 жыл бұрын
They dont know what they’re missing out on...
@H2CO3Szifon
@H2CO3Szifon 10 жыл бұрын
When an electron and a positron annihilate each other, TWO photons are emitted, not one.
@marynamdar
@marynamdar 10 жыл бұрын
in the diagram u can see it but in the equation NO.
@swangleewatanakarn7701
@swangleewatanakarn7701 3 жыл бұрын
Excellent lecture.
@SimpleScienceProductions
@SimpleScienceProductions 9 жыл бұрын
Welcome to SimpleScience! Our very new Educational KZbin Channel. On here you will get to cover all sorts of science topics ranging from Biology, to Chemistry and to Physics in SIMPLE and SHORT and EXTREMELY INFORMATIVE videos from our experts! Please come and watch our channel!
@doodelay
@doodelay 6 жыл бұрын
this is blowing my mind. I'm almost certain to go into particle physics now! Shall I also study nuclear physics as well since they seem related?
@Djembe908
@Djembe908 10 жыл бұрын
So educational!!! Even understandable to me!!!
@moisepom
@moisepom 9 жыл бұрын
great video. thank you for doing this. could you help us in understanding the basics of AdS/CFT correspondence principle ?
@IvanKalamazoo55
@IvanKalamazoo55 11 жыл бұрын
I understand nothing :).... but I really like your accent. Great job, man!!
@Unidentifying
@Unidentifying 11 жыл бұрын
It doesn't get rid of anything really. It just adds. Actually I think the double slit experiment is "THE proof" (as far as proof goes in science) for the wave-particle duality
@franktwinter
@franktwinter 4 жыл бұрын
Nice introduction! The only thing that confuses me is how at 1:04:00 you divide the fields by (ik)2 and (-i omega)? The 'k' is summed over (and so is omega) and therefor not present outside the summation
@harrymarquis9691
@harrymarquis9691 7 жыл бұрын
These videos are great, so thank you for all the help. Quick question for people who have completed an undergraduate degree in Physics... Did you cover much of this in detail? i.e stuff including the rotation operators and SU(3)xSU(2) stuff etc? I didn't encounter this in any serious detail in my undergraduate Physics degree and am only now exploring it in detail in my Physics Masters... So yeah, is this more graduate level content?
@DrPhysicsA
@DrPhysicsA 7 жыл бұрын
I suppose it depends what your particular physics course covered. Generally I think the material which I cover which is more advanced that A level would be covered in the first 2 years of a university physics course - but as I say, it depends what material your lecturers choose to cover.
@harrymarquis9691
@harrymarquis9691 7 жыл бұрын
Thank you for the reply. I was interested so I looked up where you studied. Kings College London appears to cover all of the content you have presented in these video lectures. I study in Australia and have just noticed that the physics programs in AUS are different to those in the UK. For example I haven't come across many courses in Aus that have subjects dedicated to Nuclear Physics, or Particle Physics. Thanks again for your videos!
@tonybarrera2897
@tonybarrera2897 4 жыл бұрын
Very good!
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