During the Apollo XI Moon landing, a retroreflecting panel was erected on the Moon’s surface. The speed of light can be found by measuring the time it takes a laser beam to travel from Earth, reflect from the panel, and return to Earth. If this interval is found to be 2.51 s, what is the measured speed of light? Take the center-to-center distance from Earth to Moon to be 3.84 × 108 m. Assume that the Moon is directly overhead and do not neglect the sizes of the Earth and Moon.

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter25: Reflection And Refraction Of Light
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Problem 7OQ: Light traveling in a medium of index of refraction n1 is incident on another medium having an index...
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During the Apollo XI Moon landing, a retroreflecting panel was erected on the Moon’s surface. The speed of light can be found by measuring the time it takes a laser beam to travel from Earth, reflect from the panel, and return to Earth. If this interval is found to be 2.51 s, what is the measured speed of light? Take the center-to-center distance from Earth to Moon to be 3.84 × 108 m. Assume that the Moon is directly overhead and do not neglect the sizes of the Earth and Moon.

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