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Physics 7 Online
OpenStudy (anonymous):

Electromagnetic waves differ from other types of waves because they are a continuous transfer of energy. able to travel through a vacuum. a visible form of energy. able to move particles in a medium.

OpenStudy (kropot72):

Electromagnetic waves do not need a medium to travel through. Therefore, unlike other types of waves, electromagnetic waves can travel through a vacuum.

OpenStudy (anonymous):

able to travel through a vacuum. Number 2 is it.

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