X-rays "faster" than the speed of light, and more refractive index questions
Added 2023-12-03 02:47:57 +0000 UTCHey folks, here's an early view for the follow-up video about the refractive index, which essentially goes through a few of the questions folks asked here on Patreon.
Comments
My 2 cents, I would love to see your take on diffraction and why wavelength (and not amplitude) has anything to do with how a wave passes through a slit.
Bryan Harris
2024-09-01 05:53:20 +0000 UTCThank you - if nothing is heard from me in 2 months - please send a search party!
Christopher Moon
2024-01-03 12:33:09 +0000 UTCCorrect! And this follows from Snell's law, too, since the angle of incidence would be 0
3blue1brown
2023-12-11 18:17:28 +0000 UTCFor the first question as to why slowing = bending, does that mean that if the glass isn’t positioned at an angle, then there is no bending?
Meghan
2023-12-09 19:55:20 +0000 UTCGreat visual explanations, as usual. One interesting consequence of the ability of something to travel fast than c in a non-vacuum medium is the phenomena "Cerenkov" radiation. This is the equivalent of a sonic boom but with light and is used in particle physics detectors to detect high energy particles . Perhaps this would be a fun thing to illustrate.
Tim Ryan
2023-12-06 12:28:58 +0000 UTCIt's a custom tool called Manim: https://www.3blue1brown.com/faq#manim
3blue1brown
2023-12-03 23:59:07 +0000 UTCI have a question about your explanation in the first video, where you discuss how a wave of a single frequency causes a layer of molecules to oscillate at the same frequency as the incoming light. White light comprises a continuous spectrum of colors, each representing different frequencies. You suggest that each frequency within this spectrum induces the material to oscillate at its corresponding frequency. My question is: How do these oscillations superpose? How can the molecules oscillate simultaneously at all the different frequencies present in the continuous spectrum of white light?
Carlos Yago
2023-12-03 19:03:34 +0000 UTCRe "There's no reason the phase can't shift forward": Can you clarify this more? If the induced wave in the material is a reaction to the propagating wave of the light, then how can a crest in the material come before the material "feels" the crest of the light? Or is this a steady state vs pulse question? Also, can the material shift back a phase more than one half-cycle, so it looks like it's shifting it forward? Sort of like how car wheels can look like they're rotating in the wrong direction. You drew the x-ray refracting in the prism as deflecting upward, when R deflects a little down and V deflects the most down. My assumption then is that UV, X, Gamma, would deflect more and more down as the frequency increases whereas radio, micro would deflect more and more up. The limits being full absorbtion/opaqueness to a frequency or full transparency. So why isn't this the case?
Artem Kreimer
2023-12-03 17:46:10 +0000 UTCAs always a really nice video. The animations are so beautiful.
Nico Zimmer
2023-12-03 15:03:23 +0000 UTCHi, this must have been asked already, but - how do you create your animations, I am looking for a language/package that I could learn to develop my own material. As always in total Awe with your material. All the best CM
Christopher Moon
2023-12-03 13:47:22 +0000 UTCThanks for the catch! As you can likely tell, I'm too often blind to these kinds of typos.
3blue1brown
2023-12-03 09:45:57 +0000 UTCA bit late to the party, but refraction around a sharp edge? Apart from that a great followup video. I barely know my times tables, so these followup videos to Grants more 'challenging' videos are fantastic :-)
Frank Leake
2023-12-03 09:39:26 +0000 UTCAs always, really good stuff. You should make this into a series of explaining things the "Feynman lectures" way
Martin Manscher
2023-12-03 07:45:20 +0000 UTC6:24 "what's end of the barber pole explanation?" is also missing a 'the'.
Steve Kertes
2023-12-03 07:18:54 +0000 UTCAt 2:21, "Propagation" is misspelled. Also, at 0:33, should there be a "the" after "What's" in the third point?
Marc Ethier
2023-12-03 05:33:07 +0000 UTC
