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by ared38
1122 days ago
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You are actually correct. The speed of light you always hear about is the speed of EM radiation in a perfect vacuum. In a medium such as the atmosphere, the pulse doesn't travel as fast. The slowdown depends on the refractive index, which itself depends on the frequency of the wave -- longer wavelengths have lower indices. This means that microwaves will move the tiniest bit faster than light through the atmosphere. |
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