Question

How do Astronauts communicate on the surface of moon in the absence of any atmosphere?

Answer 1

1. The velocity of electromagnetic waves like light waves or radio waves are very high than the velocity of sound in any medium i.e. 3 x10⁸ m s^-1.
2. Radio waves do not require any medium to propagate and thus, astronauts can communicate on the surface of the moon in the absence of any atmosphere.