Test Academy | A laser is a source of very intense, monochromatic, and unidirectional beam of light. These properties of a laser light can be exploited to measure long distances. The distance of the Moon from the Earth has been. already determined very precisely using a laser as a source of light. A laser light beamed at the moon takes 2.56 s to return after rejlection at the moon's surface. How much is the radius of the lunar orbit around the earth? 5.84 x 10⁸ m, 9.84 x 10⁸ m, 4.84 x 10⁸ m, 3.84 x 10⁸ m

Question

A laser is a source of very intense, monochromatic, and unidirectional beam of light. These properties of a laser light can be exploited to measure long distances. The distance of the Moon from the Earth has been. already determined very precisely using a laser as a source of light. A laser light beamed at the moon takes 2.56 s to return after rejlection at the moon's surface. How much is the radius of the lunar orbit around the earth?

Options :

5.84 x 10⁸ m
9.84 x 10⁸ m
4.84 x 10⁸ m
3.84 x 10⁸ m

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