ฝัง
- เผยแพร่เมื่อ 2 ก.ค. 2024
- All parts of the lectures can be found in this playlist
• Quantum Mechanical Vie...
Richard Feynman explains the theory for which he got the Nobel Prize, Quantum Electrodynamics, in a workshop at Esalen.
I DO NOT OWN THIS MATERIAL. IF IT VIOLATES COPYRIGHT OR SOMETHING LIKE THAT, I WILL REMOVE IT IF I AM NOTIFIED OF SUCH A VIOLATION. - วิทยาศาสตร์และเทคโนโลยี
"What do beans got to do with the Venus?" - Richard Feynman
Better without context.
Ps.. u gotta luv this guy!! If I was in his classes I would of hammered him with questions! He mentioned deterministic and super positioning with the assumption all his students knew!
I wound have had so many questions!
just love this guy! genius
Thank-you HelbergProductions for the uploads! (;
19:25 best reaction
priceless. Thank you soo much for posting!
Why cant we imagine a photon as a wave traveling around a small circle? Like a toy train going around a circular track? The 'locomotive' is the beginning of the wave and the caboose is the end. And it goes around and around . This preserves the particulate and the wave nature of light. And we dont need to think about probabilities. All we need to do is figure out where the locomotive happens to be on each photon when the photons hit matter to decide if there is interference or reinforcement. We can also use this model to understand how special relativity happens when matter approaches the velocity of light.
Lucky us who can listen to lectures of nobel prize winners from home.
Tho - Somehow i dont get that reflection/thickness graph. 😆
How is it possible to reflect 100% of the light by changing the thickness?
Does this effect only occur with monocromatic light?
I can honestly state that on the question of handwriting, mine is far superior to Feynman's. Found something!
his cursive writing was soo nice in his 64 messenger lectures! kinda cool to see his style change with the decades
The electric field direction spins at the light frequency, thus its additive when when back and front surface reflections are aligned. Its so obvious. Try doing it with polarised light which has an arrow with a fixed direction....DIFFERENT RESULTS !!!!! No surprise. Anyone told Feynman/Newton this new experiment ?
Imagine being able to draw perfect sine waves by hand
To be honest, every student working with electronics should be able to do that ;)
I had a geometry teacher who shook all the time and when he went to the blackboard, could draw a perfect circle without any variation!
emioisback, don't get hung up on the terminology or think for some reason that quantum and newtonian are two separate universes. These are just two frameworks to understand the same thing at different scales. I know what an amplitude is, and it isn't something you can "attach." It is a dynamic that can be described mathematically. Call it a freaking math attractor, because that is what an amplitude is. It's more organized than a strange attractor, but it is just as dynamic.
shouldnt the counting be done for infinite possible reflections.. because every 4% is then again going to split into 0.96 and 0.04 and that could go on for a while
I have the sense that Newton was right, but the problem we have is in supposing that it is the same photon that is being measured in the detector is the same as was released in the first place. If the photon interacts with electrons, being absorbed and re-emitted, then it could do all sorts of crazy things. But what it will tend to do is follow the path of least energy, and that results in the end as the probabilities we see manifesting.
I should have said "paths of least energy" rather than "path" as there isn't a single path or there would be no probability. Also, I didn't mean to imply that Newton was right in supposing there was some corrective force following the photon, but that the answer is to the problem lies in relation of both surfaces to each other.
jenny lynn
I'm pretty sure there was an 'edit comment' feature in 2013.
Does the mathematics of “arrows” here “rotate” in line with e^i ?
yes. the time dependence will be some sort of phase factor described by an imaginary exponential.
Yes, as the uploader said. Iirc this is because time evolution in QM is governed by e^(-iHt/hbar), where H is the Hamiltonian. Each state gets time-evolved according to its energy-which, for light, is just hf :). So you get, for that monochromatic light, that the time evolution goes like e^(-i (hf) t / hbar), which is just e^-2πift ! This is a complex exponential with no magnitude in front, so it ALWAYS has a magnitude of 1 and functions solely as a phase factor-i.e., a rotation!
Also, just wanted to add that "time" is implied in "path." lol
No.. Time is ordered
*If photons orbited a other particle that existed in a other space, we would then see photon move in wave form.*
Wave meeting waves.. Balance but not like a ball.. A hexadecimal
19:07
I am sorry to hear that you aren't understanding what I wrote. Are you familiar with Chaos math? It's pretty simple mathematics, though the concepts can get a bit complex. If you look into Chaos science a bit, I'm sure what I've written would make perfect sense to you.
Galileo , newton, Einstein , feynman, carroll...
What about Archimedes? And who is carroll?
It's not crazy.. It's pre designed.. Or it's. 😁
1.6
I’ve come to the conclusion it is probability!! It’s just a guess!
I am so pissed off from the mike position and wiring that created so much inconvenience to the professor that, I have to type that comment in between. xd
For the time, that microphone was amazing! Of course we have better ones now.
*mic