Earth and the Moon are 3.84 ?? 108 m apart. If a pulse of laser light shines on the Moon and bounces back to Earth, it completes a round-trip in about
A. less than 1 second.
B. three seconds.
C. two and a half seconds.
D. zero seconds.
Answer: C
Environmental & Atmospheric Sciences
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Fill in the blank(s) with the appropriate word(s).
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Environmental & Atmospheric Sciences