2. Suppose a spacecraft is moving in free space with a constant velocity of magnitude 0.25 c relative to an observer. An astronaut onboard the spacecraft sends out two light beams, What is the velocity back toward the observer? Choices: A. -c B. +c C. 0.25 c D. -0.25 c
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2. Suppose a spacecraft is moving in free space with a constant velocity of magnitude 0.25 c relative to an observer. An astronaut onboard the spacecraft sends out two light beams, What is the velocity back toward the observer?
Choices:
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