Quantum Electrodynamics

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Quod erat demonstrandum, or QED, is the Latin phrase for "which had to be proven"—an essential concept to the world of physics. This lesson from Es Einsteinium explains QED, a theory that proves more in physics than anything else. To a physicist, QED actually stands for quantum electrodynamics, and is the jewel of physics. Learn about its creator and how the forces between particles work!

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Such easy demonstrations really helped a lot.
Thankyou, this is exactly what I was looking for!

Poonam-tzqg
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Thanks for the awesome videos, your hard work is much appreciated!

DavieboyLondon
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I don't disagree that something appearing to be a mathematical trick should be approached with extreme skepticism. But I'm not sure how "not real" virtual particles are. Sure, they're not full harmonics---they aren't proper particles, but they fall out of several mathematical treatments (not just perturbation theory), and they lead to empirically observable effects, such as Hawking radiation and the Casimir effect.

Perhaps there's a subtlety I'm not grasping. My expertise isn't particle physics. But other particle physicist I talk to seem to share my view on things.

TimTeatro
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So, in QED terms, when two atoms collide (or I suppose, nearly collide) they bounce off each other because the electrons exchange virtual photons? Does the momentum change in the atoms get balanced by a real photon transfer (not just virtual photons?) between the electrons? If there is a transfer of real photons, do electrons end up getting excited by bumping into each other? Where do the photons come from if the electrons in the atom or molecule start out in ground state.

Actually, I guess it's equal virtual photons since the forces are equal and opposite, right?

Dethfeast
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Ambitious effort. I would encourage you to continue. May I advise you to work on your voice, it is presently distracting from the message. Maybe a bit of cadence and tonal training.

jaywulf
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Researching effects of microwaves on matter brought me here. What is the best source material to tackle in order to get a practical understanding QED?

mykulpierce
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Does neutron decay really have something to do with QED? Isn’t it all about the weak nuclear force and it’s interaction via W and Z bosons? I really don’t know just asking i would like to know what QED have to do with particle decay

Jgcgedemais
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Just write the symbols in different colours rather than colouring in.

francisfrancis
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Be careful with not drawing Minute Physics stickfigures; they might be copyrighted... not sure though...

willemvandebeek