Submitted by TheGandPTurtle t3_111g7s9 in askscience
BishoxX t1_j8ha8kg wrote
Reply to comment by Weed_O_Whirler in Light traveling through a medium that slows it. Does the same photon emerge? by TheGandPTurtle
I saw an explanation which said since light is an EM wave it moves electrons when it passes. The wave of the electrons moving is a slower wave which when combined with light makes it slower.
Or something similar to that
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