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Why does there have to be a medium for waves to travel through?

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2014-05-19 16:19:20
2014-05-19 16:19:20

There does not have to be a medium. Light does not require a medium. Mechanical waves require a medium

Answer 2:

Not all waves require a medium for their transmission. Mechanical waves require a medium for their transmission because it is the molecules of the medium which cause the wave to propagate. However, electromagnetic waves do NOT require a medium. (for example light)

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