>>11789466bump, how many times in school does one have to believe the speed of light is constant, but then dive into these random subjects where suddenly the speed of light can be slower.
fast answer (that hopefully gets BTFO'd) light isn't changing speed, the density of the medium is reflecting the particle back and forth more in its lattice before it pops back out, all these back and forth reflections increase the path length, not the speed of the light itself
