Question

Two astronauts are floating close to each other in space. Can they talk to each other without using any special device? Give reasons.

Answer 1

Sound:

1. The two astronauts are floating close to each other in space, but they cannot communicate with each other because there is a vacuum between them.
2. There is a vacuum So there are no molecules or particulate matter between them for the sound to travel through.
3. Sound waves are longitudinal waves. So they require a medium to travel through in order to propagate.
4. The molecules vibrate, passing the vibration of sound from one to the next, and thus propagating through compression or rarefaction.

Thus, no, they cannot talk to each other without using any special device.