Richard Feynman Lecture on Quantum Electrodynamics: QED. 8/8

[Austin25254]

As an electrical engineering student I learned that you can represent waves in time as complex numbers which behave somewhat like vectors. Was the entire adding vector/complex number thing just a mathematical representation of constructive and destructive interference of a wave.

[wakatuvia]

He had an answer for everything observable in nature. If he were alive today, mankind would have been at a different level.

[Vape4life]

so where we stand is nothing can be determined exactly...there will always be probability involved that can't (at least at this point) be accounted for. So God DOES play dice...

[Nomoreidsleft]

@Vape4life It's not playing with dice, when you already know all the outcomes. It's just us humans, who don't and think it's probability. We also think that time is linear and call those that can see the future, present, and past at the same time crazy or seers.

[747823]

@Nomoreidsleft

We only call them crazy when they're wrong, and they always are.

[Nomoreidsleft]

Has there been any refinement done to QED? Seems to me that he can't explain why the reflections are calculated on the probability wheel. Don't we know by now that this is base on the degrees of freedom o fthe electron cloud around the atom that's doing the reflecting? The photon hits the electron cloud, causing and electron to be ejected. Since the electron being ejected is orbiting around the atom, the direction of reflection depends in where it was in the shell.

[Vape4life]

@Nomoreidsleft But you can't be certain of where the electron is at any moment in time....so any answer will have to have probability built in. Heisenburg uncertainty principal doesn't allow you to know the exact location and speed of an electron.

[cormisterio]

Thank you!

[MuonRay]

I have uploaded the long awaited second part(see link on the description).

the 3rd part will be up soon and I hope to upload the 4th part which will be about other physics(Quantum Chromodynamics, the Electroweak Interaction and the Standard Model of Particle Physics)

[fatcat2939]

Beautiful.



[mariyam1985]

If Feynman were to work for The Teaching Company, at least half of all humanity would become career physicists.

[drsaberkhan]

@mariyam1985 i wish we could thumbs up your comment enough to make these vids visible on the YT homepage and make ppl pay attention to some of the most beautiful intelligent and yet totally entertaining videos in existense. ironic that ppl describe stuff everybody likes as `viral', things without brains that do nothing but **** anything that gives them shelter :D ohh the humanity

[100kimj]

Fantastic material - thank you for posting it. I've just starting reading the book of the lectures and it was great to be able to watch the original lectures. I'm really looking forward to seeing the rest.

[thelemur]

i so want to see the other lectures, please get them up :D

[kjrunia]

Thank you so much for this awesome material. From the giant himself. I'm so glad the probability of me finding these videos was sufficiently high to actually find these videos. Can I be of any help with the other videos? I'd be more than happy to cut them into YouTube acceptable pieces.

[MuonRay]

@kjrunia I have the videos I just need the time to cut them-> I get holidays in 2 weeks so I will be posting them then. we physicists like to work during summer.

[StAngersucks]

@MuonRay If you increase the limit of your account, you could upload longer videos and skip the splitting part.

[MuonRay]

@StAngersucks They let me do that now.

[StAngersucks]

@MuonRay Well, fine, man!

[N914TJ]

Great learning tools. Feynman after 30+ years is still well worth listening to. I might suggest that when you break for the next section to overlap 5-10 seconds. It creates better continuity between the segments.

[skinnyjohnsen]

I too will thank you for the uploads. Be aware that you can now upload up to 15 min. segments without being a partner.

[cloffff]

Thanks very much for posting this!

I will also be eagerly waiting for the second lecture. Please dont forget ;]

[SZambayon]

Thank you so much for uploading this lecture!

I wanted to ask you if you have the videos of "the next lecture" which he reffers to repetedly?

[MuonRay]

@SZambayon I will try and post it as soon as possible. These lectures are long, and have to be shortened down into smaller segments; youtube will not let me use the full versions of the lectures without having sponsership- in other words they only allow large videos if they have lots of pointless adds at the start from big, faceless, out-of-touch and greedy corporations.