Question

Astronauts communicate with one another on moon with the help of.

• A. radio waves
• B. sound waves
• C. ultrasound waves
• D. infrasound waves

Answer 1

The correct option is A radio waves

Answer is A.
Astronauts communicate with each other in space when they are spacewalking through the use of radio waves. Radio wave signal are sent to their headsets which then translates the signal into the form of sound . When receiving and sending message to earth it is sent in the form of radio waves which is then translated to sound wave (message) by a radio set.