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Which of the following is not a characteristic of electromagnetic waves? (A) They can travel at various speeds through any one material. (B) the can be refracted. (C) They can be reflected. (D) They can travel through a vacuum.

Respuesta :

AL2006
B. C, and D are true. A isn't.

In any given material, EM waves have a single speed. It's

(the speed of light in vacuum)
divided by
(the index of refraction of that material).

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