Question

15. A LASER light beamed at the moon takes 2.56 s to return after reflection at the moon's surface. If speed of LASER light in vacuum is 3 * 108 m/s, then the distance of moon from the surface of earth will be O (a) 7.68 x 108 m O (6) 3.84 x 108 m O (C) 6400 km O (d) 1.17 x 108 m​

Answer 1

Answer:

the answer of this question is (b)