How are electromagnetic waves and sound waves related and unique from each other?
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A wave is just a periodic form of energy propagating out from a source. There’s a bunch of different kinds of waves. Sound waves like you say, are energy moving through the air. Ocean waves are the energy moving through water, etc. Electromagnetic waves are different from most other kinds of waves in that they do not move through a “medium”. Mediums are the things that hold the waves energy, like the air for sound waves.
So to say how they are the same- they’re both waves that move energy from one spot to another.
And to say how they are different- electromagnetic waves have no medium, while sound has the medium of air.
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