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nek01sh

Answer:

OK Light travels from the stars to the earth through he vacuum of space so A&B are out

Also scientists have measured the speed of light of stars traveling towards and away from the earth at fantastic speeds and always get exactly the same answer. Determining that the speed of light is constant.

Explanation: Answered this question last week.

Light, in a vacuum, travels at the same speed even if the light source is moving. Light given off from a moving source will travel faster in a vacuum. Light given off from a moving source will travel faster in air. Light, in a vacuum, travels slower if the light source is moving.

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