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in Nature of Physical World and Measurement by (48.1k points)
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A laser light beamed at the moon takes 2.56s and to return after reflection at the moon’s surface. What will be the radius of lunar orbit?

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t = 2.54 s

∴ t = time taken by laser beam to go to moon= \(\frac{t}{2}\)

Distance between earth and moon = d= c x \(\frac{t}{2}\) = 3 x 108 x \(\frac{2.56}{2}\) = 3.84 x 108m

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