Question

Radio waves are reflected off the moon and recieved back on the earth the time between the sending of the signal and receiving it back on the earth's surface is 2.5 seconds.
then what is the distance of the moon from the Earth.

Please answer this it's really Urgent. Please help. ​

Answer 1

Answer:

During the trip the distance traveled by the signal is 2×distance between earth and moon=2x

We know time=2.5s=

speed

distance

=2x/(3×10

8

)

so 2x=7.5×10

8

so distance x=3.75×10

8

meter=3.75×10

5

Km