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05-06-2017
Physics

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Which of the following is a true statement A. The speed of an EM wave depends on its frequency. B. EM waves move faster in a medium than in a vacuum. C. The speed of an EM wave depends on the motion of the source. D. The fastest possible speed is the speed of light in a vacuum.

Respuesta :

19-06-2017

D is correct as EM waves, like light, travel at a speed of 3 × 10⁸ m/s in a vacuum and travels slower in a medium.

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