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# What is constant in electromagnetic waves?

Updated: 9/16/2023

Wiki User

14y ago

The speed is constant, at least for EM waves in a vacuum. The speed will still be approximately the same in other media, e.g. in glass. Different waves can have different frequences or wavelengths, but the speed will be the same.

Wiki User

14y ago

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Q: What is constant in electromagnetic waves?
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