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- Today, 03:39
- Aug 14, 2020
Yes, I remember you giving the example of a black hole for the reason light must slow down.I am not sure what I said. but light is just as susceptible to gravity as anything else. Nothing larger than an atom can avoid gravity and no sub atomic particle can escape gravity. That includes electro magnetic radiation of which light is a form. The proof is that light leaving a black hole is prevented from escaping from the black hole and we can never see it. There is no greater reduction in speed than to stop altogether and (although it is never observed) to be pulled back into its source.
If light leaves a distant source "A" it travels through the vacuum at SOL. If it encounters a massive object like a large star "B" in its path it will be pulled right into it (the portion on that path) The proof is an eclipse of the moon coming between the sun and earth. The portion of the light that is not on a collision path with the star "B" may bend due to the gravitational pull or the star and set off towards us on a new path so we can see it.
If that star "B" were not there, it would take 1,000,000 light years to reach us.
The existence of the star "B" gives a path in the shape of an obtuse triangle. The long side being the direct line and the other two sides being the actual length the light has to travel. The bent light takes longer to arrive to us, but its speed never alters, it just travels a longer journey.
Why think of it like that? Light "bends" because of the 'curvature of space'.. so why not think of light not escaping (beyond the event horizon of) a black hole because it's like bending around in a circle.. Rather than it slows down.. and stops