You shine a beam of monochromatic light from Earth to an astronaut friend in orbit. The light your friend receives, relative to light from an equivalent source on the spaceship, is slightly
A)slower in speed.
B)higher in speed.
C)neither of these

Question

Quizplus · Accepted Answer

The speed of light is a constant in a vacuum and is not affected by relative motion. Therefore, the light received by the astronaut friend will have the same speed as light from an equivalent source on the spaceship.

You Shine a Beam of Monochromatic Light from Earth to an Astronaut