MadSci Network: Astronomy
Query:

Re: How long does it take for light from the moon to reach the earth?

Date: Wed Jul 19 08:24:10 2000
Posted By: Pauline Barmby, grad student, Harvard University Astronomy Dept.
Area of science: Astronomy
ID: 963846126.As
Message:

Light takes about one and one quarter seconds to go between the moon
and the Earth. The distance is 384400 km; the speed of light is about 
300000 km/s. t=d/v=384400/300000=1.28 sec. 

Pauline Barmby


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