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How long does it take a laser beam to hit the moon and return to earth?
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How long does it take a laser beam to hit the moon and return to earth?

User XiB
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The distance from the moon to the Earth is equal to 384,400 km, and the speed of light is equal to 300,000 km/s.

Knowing this, we can use the formula below to calculate the required time, where the total distance will be 2 times the distance from the moon to the Earth:

Therefore it takes 2.56 seconds.

How long does it take a laser beam to hit the moon and return to earth?-example-1
User Damianodamiano
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