A laser light beamed at the Moon takes 2.56s and to return after reflection at the Moon's surface. What will be the radius of lunar orbit?

A laser light beamed at the Moon takes 2.56s and to return after refle

1.	A laser light beamed at the Moon takes 2.56s and to return after reflection at the Moon's surface. What will be the radius of lunar orbit?
Answer» Solution :t = 2.54s `:.` t = TIME taken by laser BEAM to go to the Moon = `t/2` DISTANCE between Earth and Moon = `d = c xx t/2 = 3 xx 10^(8) xx (2.56)/(2) = 3.84 xx 10^(8)` m