On the Moon's surface, lunar astronauts placed a corner reflector, off of which a laser beam is periodically reflected. The distance to the Moon is calculated from the round-trip time. The Earth's atmosphere slows down light. Assume the distance to the Moon is precisely 3.84 x 108 m, and Earth's atmosphere (which varies in density with altitude) is equivalent to a layer 30.0 km thick with a constant index of refraction n = 1.000293. What is the difference Ar in travel time for light that travels only through space to the moon and back and light that travels through the atmosphere and space? At = 3.909 x10-8 Incorrect S

On the Moon's surface, lunar astronauts placed a corner reflector, off of which a laser beam is periodically reflected. The distance to the Moon is calculated from the round-trip time. The Earth's atmosphere slows down light. Assume the distance to the Moon is precisely 3.84 x 108 m, and Earth's atmosphere (which varies in density with altitude) is equivalent to a layer 30.0 km thick with a constant index of refraction n = 1.000293. What is the difference Ar in travel time for light that travels only through space to the moon and back and light that travels through the atmosphere and space? At = 3.909 x10-8 Incorrect S