Question

Two astronauts on the surface of the moon cannot talk to each other. Why?
A. There is no atmosphere on the surface of the moon
B. There is no medium in between the two astronauts
C. The sounds cannot propagate
D. All

Answer 1

Hint: Because sound waves can't travel when there's no atmosphere, we can't hear each other on the moon's surface. Sound waves must pass through a physical medium. Sound waves travel by compressing and then lengthening; this process continues until the sound wave reaches its destination. With the above-mentioned logic, we will find which option is correct.

Complete answer:
Now, let us check each option;
First options: As we know that there is no medium or atmosphere on the surface of the moon so we can easily say that sound will not be able to travel thus resulting they cannot talk to each other.

Second options: With the help of the above explanation, we can easily say that as there is no atmosphere which means it is clear that there is no medium between both the astronauts resulting, they cannot talk to each other.

Third options: From the definition of sound, we can easily judge this statement that sound needs a medium to propagate so we can say that there is no medium on the surface of the moon so both of them cannot talk to each other.

And the last option: As we can conclude from the above statement all the given options support the statement given so we can say that all options are right.

Hence option D is the correct option.

Note: In contrast to sound waves, Electromagnetic waves are capable of travelling into space's vacuum. Electromagnetic waves flow through space without the need for any other medium. As a result, astronauts on the moon's surface communicate with one another via radio waves, which are electromagnetic waves and hence easily transmitted on the moon's surface.