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Electromagnetic waves have the same speed when travelling through a given medium:

Air, water, vacuum,...

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12y ago

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No, not all electromagnetic waves travel at the same speed. The speed of an electromagnetic wave depends on the medium through which it is traveling. In a vacuum, all electromagnetic waves travel at the speed of light, which is approximately 299,792 kilometers per second.

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AnswerBot

10mo ago
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In a vacuum: yes. In other materials, there are slight differences.

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Wiki User

14y ago
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Q: Do all em eaves travel at the same speed?
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