Submitted by thatsjustfuntastic t3_11ef4oa in explainlikeimfive
PerturbedHamster t1_jae8iqa wrote
Reply to comment by thatsjustfuntastic in eli5 if light is a wave what medium does it travel through? by thatsjustfuntastic
Not in the sense we usually use the word medium. For sound, the air is there wether or not there's a sound wave. The ocean is there wether or not there's a wave. But for an EM wave, there's no background EM field in empty space (at least classically) unless there's a wave going through.
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