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Consider a pulse of laser light aimed at the Moon that bounces back to Earth The distance between Earth and the Moon is 3.8x108 m Show that the round-trip time for the light is 2.5 s?
Wiki User
∙ 9y ago
The speed of light is roughly 3.0x10^5 km/s, while the distance for a round trip is roughly 7.6x10^5 km. The time can be found by dividing the distance by the speed, which results in 2.5 seconds when obeying standard significant figures rules.
Wiki User
∙ 9y ago
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