Which of the following is true about the speed of light? A.) It is a constant when the light is traveling in a vacuum. B.) It speeds up or slows down depending on the observer. C.) It is slowest in a vacuum.

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asked Oct 27, 2020 1.0k views

3 votes

Which of the following is true about the speed of light?

A.) It is a constant when the light is traveling in a vacuum.

B.) It speeds up or slows down depending on the observer.

C.) It is slowest in a vacuum.

D.) It varies depending on the color of the light.