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It doesn't tell the mechanism for how the medium can change the light speed there. The last video I posted shows why it's false, using the refraction of X-ray from air to glass.The first videos in this thread shows more examples. Have you watched them?
If I make an optical fibre out of glass with a refractive index of 1.5 and I send a flash of light down a kilometer of this cable, how long does it take the flash to reach the other end?What is the speed of light in that glass?
If you use one of these sorts of things to measure the depth of a swimming pool, do you get the right answer?https://www.toolstation.com/dewalt-dwht77100-xj-laser-distance-measure-30m/p67627?store=AG&utm_source=googleshopping&utm_medium=feed&utm_campaign=googleshoppingfeed&mkwid=_dc&pcrid=&pkw=&pmt=&gclid=Cj0KCQjwl92XBhC7ARIsAHLl9ak1eLlUzABZzcj2kekc_LMN7C-ixh7mcv0xwXPE-UhtrNAlFav1mK0aAoEFEALw_wcB&gclsrc=aw.ds
Quote from: hamdani yusuf on 13/08/2022 04:06:58It doesn't tell the mechanism for how the medium can change the light speed there. The last video I posted shows why it's false, using the refraction of X-ray from air to glass.The first videos in this thread shows more examples. Have you watched them?I suggest you figure out a way to get a physics degree. You seem truly interested in physics but watching youtubes and trying to make experiments with subpar equipment is only confusing you. Without a solid understanding of basic physics you will never understand the more complicated and nuanced concepts.
The explanation offered in this video is more compatible with my own experiments using microwave transceiver, although there are still some discrepancies.
Questioning discrepancy between theory predictions and observation can be done anytime by anyone. No degree is needed.
Are you aware that EM radiation has two velocities?https://en.wikipedia.org/wiki/Phase_velocityhttps://en.wikipedia.org/wiki/Group_velocity
But as Deecart has pointed out, ε < 1 at very high frequencies so the propagation direction can tend away from the normal, depending on the propagation mode, even if v (scalar) < c.
The question is, how do various matters change light velocities differently?
Interesting? Only that the phenomenon was completely described by a Peterhouse man 40 years before x-rays were discovered.
PS it just occurred to me that you could look at x-ray refraction in terms of momentum transfer. Visible light just wiggles the electrons a bit so the wavelet analysis gives you a reasonable model of forward propagation, but x-ray photons transfer significant momentum, so conservation demands that the forward displacement of the substrate electrons is compensated by a lateral deflection of the propagation vector.
Quote from: alancalverd on 15/08/2022 10:41:56Interesting? Only that the phenomenon was completely described by a Peterhouse man 40 years before x-rays were discovered.Why it's not widely acknowledged by physicists, as pointed out by the first videos here?
How can it be used to explain other closely related phenomena, such as reflection, total internal reflection, absorption, and polarization?
You will have to ask them.Lack of a proper education, perhaps? Failure to respect true genius? Political Correctness (Peterhouse was one of the last colleges to admit women)? Maxwell was considered a bit odd, socially, at the time.More likely: Few people study both classical and x-ray optics.The refraction of high energy photons is small and has no practical application that I know of, and physics usually derives from engineering, not the other way around.
Quote from: hamdani yusuf on 16/08/2022 04:12:51How can it be used to explain other closely related phenomena, such as reflection, total internal reflection, absorption, and polarization?It can't, but momentum transfer is the basis of the Mossbauer effect.
We do not believe any group of men adequate enough or wise enough to operate without scrutiny or without criticism. We know that the only way to avoid error is to detect it, that the only way to detect it is to be free to enquire. We know that the wages of secrecy are corruption. We know that in secrecy error, undetected, will flourish and subvert.J. Robert Oppenheimer
At least we know that there's still a gap in understanding of refraction.
If the theory were accurate enough to be used as first principle in engineering, it would be widely used, because rejecting it would bring competitive disadvantages.