Saturday, 28 January 2017

optics - At Interfaces Does Light Have to Accelerate?


First, I'm not sure if photons have to "get up to" the speed of light, or if they are thrown into existence at that speed. I know that they should just be generated moving at their speed, and I know that they have zero mass so asking about acceleration is a little strange, but what about when light hits an interface? Does it need to "slow down" to the new speed of light? Or does a new photon get generated?




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