Question

An astronaut cannot hear his companion at the surface of the moon because –

• A. Produced frequencies are above the audio frequencies
• B. There is no medium for sound propagation
• C. Temperature is too Low during night and high during day
• D. There are too many craters on the surface of the moon

Answer 1

Answer: (B)

There is no medium for sound propagation

Answer 2

Sound wave require material medium and as on moon, there is no atmosphere, that's why sound can not propagate.