Submitted by TheGandPTurtle t3_111g7s9 in askscience
ContaminatedPrime t1_j8ggaq1 wrote
Reply to comment by taphead739 in Light traveling through a medium that slows it. Does the same photon emerge? by TheGandPTurtle
Photons are bosons. They have no exchange interaction. Only exists for fermions.
taphead739 t1_j8h8f9d wrote
Exchange interaction exists for bosons and it is attractive: https://en.m.wikipedia.org/wiki/Exchange_interaction
Explains the superfluidity of helium-4, for example
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