Answer
1.25 s
Work Step by Step
How long will it take for reflected sunlight to travel to the Earth from the moon?
Use the relationship d = vt and solve for the time. Use d = the Earth–Moon distance (from the inside front cover), $d_{moon/Earth}=384\times10^{6}m $.
To be more accurate, subtract the Earth’s radius and Moon’s radius from this distance because the sunlight is reflected from the lunar surface and is received on Earth’s surface.
$d_{revised}=384\times10^{6}m-6.38\times10^{6}m -1.74\times10^{6}m $
$$t=\frac{d}{v}=\frac{ d_{revised}}{3.00\times10^8m/s}=1.25s$$
