The speed of light is 3.00*108m/s. How long does it take for light to travel from Earth to the Moon and back again?

Question

Isis Pennington

Chemistry

23 February, 06:16

The speed of light is 3.00*108m/s. How long does it take for light to travel from Earth to the Moon and back again?

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Answers (1)

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Jaxon Brady · Answer 1

The variable we have to determine for this problem is the time. Since the given information is speed, we have to know the distance so that we can solve for the time. From literature, the distance between the Earth and the moon is 384,400,000 meters. Therefore,

Speed = Distance/Time

Time = Distance/Speed

Time = 384,400,000 m / 3*10⁸ m/s = 1.28 seconds