Submitted by TheGandPTurtle t3_111g7s9 in askscience
HoldingTheFire t1_j8gzz8b wrote
Reply to comment by masterofshadows in Light traveling through a medium that slows it. Does the same photon emerge? by TheGandPTurtle
Because photons aren’t traveling through a medium of photons. It’s a propagating electromagnetic field.
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