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Light from a stationary spaceship is observed, then the spaceship moves directly away from the observer at high speed while still emitting the light. As a result, the light seen by the observer has: A. a higher frequency and a longer wavelength than before B. a lower frequency and a shorter wavelength than before C. a higher frequency and a shorter wavelength than before D. a lower frequency and a longer wavelength than before E. the same frequency and wavelength as before |
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Answer» D. a lower frequency and a longer wavelength than before |
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