How long does it take to bounce a laser beam from the moon and back to earth

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How long does it take to bounce a laser beam from the moon and back to earth

[From: ] [author: ] [Date: 11-06-10] [Hit: ]

3E8 m/s. Therefore it will take 7.6 / 3 = 2.5 s (since the E8 parts cancel).-http://en.wikipedia.......

The moon is 3.8E8 m away from the earth. How long would it take for a laser beam to bounce off the moon and come back to earth?

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The distance to the moon and back is 7.6E8 m and the speed of the laser beam will be the speed of light in a vacuum, 3E8 m/s. Therefore it will take 7.6 / 3 = 2.5 s (since the E8 parts cancel).

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http://en.wikipedia.org/wiki/Lunar_Laser…

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2.6 s.

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