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But light propagates through optical fiber slower than through air. Hence the speed is different.
Even a professional physicist can't explain refraction clearly.
Quote from: hamdani yusuf on 22/08/2022 11:37:08But light propagates through optical fiber slower than through air. Hence the speed is different.Because ε and μ are different. What do you expect?
In fact, they have the same speed, but different phase.
I expect he didn't write this.
I hope you can learn something about context.
He makes a statement about combining waves.If you combine waves of different speeds you get other, slower waves.This is true; but irrelevant.At about 8:55 he says that you get a combination of waves in light travelling through matter.He doesn't say how they differ. He doesn't say if they differ in phase or speed.In fact, they have the same speed, but different phase.He could certainly have made it clearer than he did.
Quote from: hamdani yusuf on 22/08/2022 11:37:08Even a professional physicist can't explain refraction clearly.This guy did.//www.youtube.com/watch?v=JZOn1B8K8mA
Quote from: hamdani yusuf on 09/08/2022 05:11:49Have you seen the video?No, the reason there is no need to see it is this statement you made:"The explanation offered in this video is more compatible with my own experiments".You are not physicist (probably haven't even taken a single physics course) and your posting history is full of errors and misconceptions, so if the video disagrees with mainstream physics and aligns with your ideas then it is not worth watching.
Have you seen the video?
Quote from: hamdani yusuf on 22/08/2022 13:21:50I expect he didn't write this.I'm sure he didn't write it; because I did.Quote from: hamdani yusuf on 22/08/2022 13:21:50I hope you can learn something about context.The context is that I wrote it here.Quote from: Bored chemist on 22/08/2022 10:26:49He makes a statement about combining waves.If you combine waves of different speeds you get other, slower waves.This is true; but irrelevant.At about 8:55 he says that you get a combination of waves in light travelling through matter.He doesn't say how they differ. He doesn't say if they differ in phase or speed.In fact, they have the same speed, but different phase.He could certainly have made it clearer than he did.
This guy did.
A more reasonable explanation is that the X-ray phase is delayed more than half wave, creating an illusion that it was sped up less than a half wave. Hence, actually the X-ray propagates through glass even slower than ultraviolet light, which is slower than visible light.
Quote from: hamdani yusuf on 22/08/2022 14:52:02A more reasonable explanation is that the X-ray phase is delayed more than half wave, creating an illusion that it was sped up less than a half wave. Hence, actually the X-ray propagates through glass even slower than ultraviolet light, which is slower than visible light. That may be reasonable, but it doesn't work.It's not a fixed phase delay, it's a delay each time the photon encounters an electron.If your idea was right then the apparent refractive index would depend on thickness.
wavelength penetration depth.
Quote from: hamdani yusuf on 23/08/2022 10:07:23 wavelength penetration depth.That's a novel concept. Can you define and explain it?
Don't calculate per electron. Do it accumulatively per wavelength penetration depth.
Quote from: hamdani yusuf on 23/08/2022 10:07:23Don't calculate per electron. Do it accumulatively per wavelength penetration depth.We do.That was my point.
If your idea was right then the apparent refractive index would depend on thickness.
A more reasonable explanation is that the X-ray phase is delayed more than half wave,
Quote from: hamdani yusuf on 22/08/2022 14:52:02A more reasonable explanation is that the X-ray phase is delayed more than half wave, When?is it half a wave at every interaction with an electron?Half a wave for every millimetre of glass?
Let's say that the wavelength of the X-ray is 10 Angstrom, and the atomic spacing of the glass is 1 Angstrom. The phase of the X-ray is delayed by 7 Angstrom after penetrating the glass as far as 10 Angstrom. It creates an illusion that the phase is sped up by 30%. In average, each atomic layer of the glass delays the phase by 0.7 Angstrom.
Why do we still have widely spread incorrect explanations as described in the first videos here?
Quote from: hamdani yusuf on 18/08/2022 12:06:12Why do we still have widely spread incorrect explanations as described in the first videos here?The answer is straight forward.Because we only provide explainations based on theory, not some proof based on some experimentation.If there was some experimental proof, any physicist would, like everytime, use these experiments to explain the phenomenon.Here, when we say that the light wave produce a change in the electronic situation of the matter, this is theory.To proof that is is the case (so using some experiment) we would need to do the observation that there is a delay between the advance of the wave into the matter and the feedback effect.
Continuing my effort to understand the behavior of microwave in another thread, here I'd like to share experiments showing how radio wave behaves. I've prepared some experimental equipment, but didn't have enough time to execute the experiments yet, so for now I'll put this well made video from Harvard Natural Sciences Lecture Demonstrations first.//www.youtube.com/watch?v=wUpOlqbHcjI
So we have to do the observation to give the proof : When the firsts photons enter the matter, the light beam go straight and when the electron of the matter is affected by the beam (after some delay), the light beam do not go straight away any more, so it "curves".
Where does it curve to?
How does it return to the original direction?
Have you watched the first video in this thread?
It do not return to the previous direction.It start with no refraction at all (because there are no photon already at place so the electrons are not already affected) : So the light beam go first straight away. THEN, with some delay, the light beam "curve" (do the refraction).This is what we should see if the theorical explaination in the video is correct.
Yes.