Question

how does light travel?
A. light only travels in a vacuum and travels faster when the sound is moving
B. light on only travels in a medium and light travels faster when a Sound Source is stationary
C. light can travel in a vacuum in 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 weather the light source is stationary or moving

Answer 1

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

Answer 2

Answer: The correct answer is option(D).

Explanation:

Light travels in a straight line as a wave. It does not require any medium or material to travel like sound waves which means it can travel in vacuum.The speed of the light  from the special theory of relativity is a constant value of  $34\times 10^{8} m/second$.

Hence, the correct answer is option (D).