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D. 2.00
2. In a Michaelson interferometer, a 4-sided mirror rotates in place. A laser beam
strikes the rotating mirror and travels 100 m to a stationary mirror, which reflects the
beam back. What is the smallest frequency required to rotate the mirror so that the
reflected beam follows the same path as if the mirror was not rotating?
A. 1.50 x 106 Hz
B. 3.00 x 106 Hz
C 3.75 x 105 Hz
D. 7.50 x 105 Hz
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