IMHO these videos in one fell swoop both over complicate and over simplify. even this will manifest an apparent departure from c. You might consider these interactions "negligible" however consider that time itself is dilated toĪ very small extent by the higher gravitational distortion in a denser ambient. it still comes down to propagation delay. gravitation plays a role, wave interference etc. the absorption of the energy of the photon and the re-emission is just one example of propagating interaction. how would you measure the progress of individual photons to determine the delay of each?Ģ. it does not travel in "exactly" the same direction, reference diffraction, dispersion, scattering etc. In other words, why doesn't the light disperse in space and time? Also, why is glass equally transparent to many wavelengths, since atomic absorption tends to have specific energy levels?ġ. OK, then you'll need to explain how a "re-emitted" photon travels in exactly the same direction as the others and is emitted with exactly the same delay as the others. ![]() But the split up terms do provide some physical insight. Bear contemplates some questions of his about water - just what shape it is and why it's so wet. Ojo, for example, is pretending to sail a ship in the living room. Bear and his friends are interacting with water in this episode - be it real or imaginary. ![]() The other two waves are notional - we can't physically split an EM field into two separate EM fields, only split the mathematical description into two separate terms. Water, Water Everywhere is the second episode of the first season, 2nd episode overall. So Lincoln's "new wave" is the physical reality - a light wave in a medium. I would say that his argument is that if you take the real electromagnetic field present in the medium (analogous to the third wave) and subtract something that looks like a light wave in vacuum (analogous to the first wave), the remainder (analogous to the second wave) turns out to look like the wave that would be emitted by atomic electrons that just happened to be oscillating as if they'd been driven by the light. I would say that those diagrams are actually the reverse of the argument he's making. Take a look at the diagrams around 8:30 (and the earlier ones around 7:03) in Lincoln's video, where he's showing two waves adding to make a third. I would describe that "new wave" as "a light wave in a medium". ![]() But what is this "new wave"? Is it light, or what?
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