During the Apollo XI Moon landing, a retroreflecting panel was erected on the Moon’s surface. When the moon is directly ahead, the speed of light is found by measuring the time it takes a laser beam to travel from Earth, reflect from the screen, and return to Earth.
During the Apollo XI Moon landing, a retroreflecting panel was erected
on the Moon’s surface. When the moon is directly ahead, the speed of light is found by measuring the time it takes a laser beam to travel from Earth, reflect from the screen, and return to Earth. If this interval is measured to be 2.6 s, what is the measured speed of light? Take the center-to-center distance from Earth to Moon to be 3.72 × 108 m, and do not neglect the radii of the Earth (6.37 × 106 m) and Moon (1.74 × 106 m).
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