A LASER is a source of very intense,monochrom | vedclass

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(B) The total time taken by the laser beam to travel to the Moon and return to Earth is $t = 2.56 \; s$.The speed of light is $c = 3 	imes 10^{8} \;

Vedclass · Accepted Answer

$3.84 	imes 10^{5} \; km$

Vedclass · Answer

(B) The total time taken by the laser beam to travel to the Moon and return to Earth is $t = 2.56 \; s$.The speed of light is $c = 3 	imes 10^{8} \; m/s$.The time taken for the light to reach the Moon is $t' = \frac{t}{2} = \frac{2.56}{2} = 1.28 \; s$.The distance $d$ (radius of the lunar orbit) is given by $d = c 	imes t'$.$d = (3 	imes 10^{8} \; m/s) 	imes (1.28 \; s) = 3.84 	imes 10^{8} \; m$.Converting meters to kilometers: $3.84 	imes 10^{8} \; m = 3.84 	imes 10^{5} \; km$.

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