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Yes, if the Universe was a perfect vacuum with no troublesome gravity around, light would always go in straight lines.Unfortunately, the Universe doesn't meet your requirements. It's a bit more complicated.
Quote from: Michael Sally on 29/03/2021 19:12:22 I guess I will see my question and answer in the future coming from a more celebrity scientist ?Guess again.
I guess I will see my question and answer in the future coming from a more celebrity scientist ?
Quote from: Michael Sally on 29/03/2021 19:48:37Light passing through a medium is affected by the permeability of the medium and it is a fact that acceleration is required for something to speed up . Why are you denying simple school boy physics such as what is required to accelerate ?Okay, if this really is "simple school boy physics", then you should easily be able to find a reputable source that confirms there is an attractive force that accelerates light when it exists a medium. I'll be waiting.
Light passing through a medium is affected by the permeability of the medium and it is a fact that acceleration is required for something to speed up . Why are you denying simple school boy physics such as what is required to accelerate ?
I asked a new question about lights speed being a consequence of an external attractive force which the physics and observations agree with . I don't expect to find a present citation or reputable source when the reputable source and citations have not yet been created .
However , one did not expect to find a moderator on such a reputable science forum who doesn't know the physics of how acceleration works.
Quote from: Michael Sally on 29/03/2021 20:09:41I asked a new question about lights speed being a consequence of an external attractive force which the physics and observations agree with . I don't expect to find a present citation or reputable source when the reputable source and citations have not yet been created .But you said that it's "simple schoolboy physics". If that's true, then schoolboys should know about it and, by extension, existing physicists.Quote from: Michael Sally on 29/03/2021 20:09:41However , one did not expect to find a moderator on such a reputable science forum who doesn't know the physics of how acceleration works.The photons don't actually change speed when they enter a material, so there is no acceleration involved://www.youtube.com/watch?v=mICTVow3-3I
How do explain this is you claim photons don't change speed when entering a material ?
Because you are talking about a different phenomenon. When a material absorbs photons instead of transmitting them, the photons stop existing. They are converted into heat.
The photons don't actually change speed when they enter a material, so there is no acceleration involved:
The short of it is that light slows down in matter because it induces interference with itself and then speeds back up when it exits because that interference is no longer there.
so there is no acceleration involved:
A photon that doesn't exist isn't a photon. Surely you already knew that?No, being a moderator isn't a job. It's a volunteer position. I understand acceleration just fine. The photons don't accelerate because they neither slow down nor speed up. So no need to invoke a mythical attractive force.
Quote from: Michael Sally on 29/03/2021 20:26:28How do explain this is you claim photons don't change speed when entering a material ?Because you are talking about a different phenomenon. When a material absorbs photons instead of transmitting them, the photons stop existing. They are converted into heat.
If you had actually watched the video I posted, you'd realize that the speed of the bulk light wave is different than that of the individual photons. The total light wave changes speed due to interference patterns, but the individual photons don't. So to answer the question of the OP again: no, the speed of light is not due to some mythical external force.
Charles, I never said anything about photons ceasing to exist inside of glass. Glass is transparent. I was referring specifically to opaque materials when I said photons get converted into heat.
Charles, I never said anything about photons ceasing to exist inside of glass. Glass is transparent. I was referring specifically to opaque materials when I said photons get converted into heat.Thebox, I take it that you still haven't watched the videos I've posted. Not that I'm surprised.
Care to do some calculations with that equation that you've provided? It would be nice if you could show that it is correct that way.
I can create the formulas that explain the processes physics accurately , I think we just need some values to input .
Quote from: Michael Sally on 30/03/2021 05:13:15I can create the formulas that explain the processes physics accurately , I think we just need some values to input .If you don't know how to do the math, then how do you know your equation is right?