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31 December, 16:05

How does light travel?

A. Light only travels in a vacuum and travels faster when the sound source is moving.

B. Light only travels in a medium and light travels faster when a sound source is stationary.

C. Light can travel in a vacuum and the speed varies depending on whether the source is moving or stationary.

D. Light can travel in the air or a vacuum and the speed is constant whether the light source is stationary or moving.

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Answers (2)
  1. 31 December, 16:27
    0
    The correct answer is D ...
  2. 31 December, 16:28
    0
    The answer is D, it doesn't matter what it's going through, the speed of light is a universal constant.
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