Question: How long does a laser beam take to travel from the Earth to a reflector on the Moon and back? Take the distance from the

How long does a laser beam take to travel from the Earth to a reflector on the Moon and back? Take the distance from the Earth to the Moon to be 2.4 x 105mi. (This experiment was done when the Apollo flights of the early 1970s left laser reflectors on the lunar surface.)

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