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Is a vacuum still a vacuum if there are electromagnetic waves in the vacuum?

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Answer:

Yes, a vacuum is still a vacuum if electromagnetic waves are present. A vacuum is an area with no matter in it. We know that matter is anything which has mass and takes up space. Electromagnetic waves have no mass, and certianly take up no space. They're energy.

First answer by ID1657303023. Last edit by ID1657303023. Question popularity: 2 [recommend question].

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Relevant answers:

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