Question

Why can't astronauts hear each other in space?

Answer 1

Mechanical waves

1. The oscillation of matter is responsible for the transfer of energy through a medium in the case of mechanical waves.
2. Electromagnetic waves do not require a medium for their propagation, but mechanical waves cannot travel in the absence of a medium or in a vacuum.

Explanation

1. We know, when we talk, the information is passing through sound waves.
2. Sound is a mechanical wave and mechanical waves require a medium for propagation.
3. As in space atmosphere is absent, there is no medium for propagation of sound waves, i.e., mechanical waves.
4. So, the sound waves do not travel and hence astronauts cannot hear each other.

So astronauts cannot hear each other in space as sound cannot travel in space