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)
@@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 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.
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.
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.
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.
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.
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
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
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
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
Very strange. I was watching a video on RU-vid 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?!
Well.. That just changed my life. Just had a nice history lesson from Ernest Rutherford -> Albert Einstein -> Max Planck -> De Broglie -> Werner Heisenberg -> William Hamilton -> Joseph Fourier -> Charles Hermite -> Erwin Schrodinger! Beautiful! I'm so grateful for you sharing this.
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
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!
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!
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.
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!
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 !!!
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:)
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.
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!
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.
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.
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.
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.
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!
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.
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?
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.
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.
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 ..."
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?
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).
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.
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?
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.
-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.
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.
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!
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.
eg the a- . You do indeed sum over all values of k. But since there is only one particle of a specific momentum k that is the one which is annihilated. All other values of a(k) achieve nothing.
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.
