The speed of light slows as it traverses through a different medium, but after slowing it finds a way to accelerate back to original speed as it exits that medium. How does it do that?
In: 93
Light always moves at the speed of light. When it travels through a medium, it still goes at the speed of light it just might take a longer path. If light travels through some material at “half the speed of light” it doesn’t actually change speed, it just takes a path twice as long as the straight-line path.
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