The Moon is approximately 250000 mi from us and the Sun is a

The Moon is approximately 250,000 mi from us and the Sun is approximately 93,000,000 mi away. How much time is required for an electromagnetic wave to reach us from the Sun and the Moon?

Solution

A)

Time taken to reach from sun:

Distance=93000000 mi

=1.49*10^11

Speed=3*10^8 m/s

time= distance/time

=496.6 sec

B)

From moon:

Distance=250000 mi

=4.02*10^8 m

Speed=3*10^8 m/s

time= distance/time

=1.34 sec