27_InstSolManual_PDF_Part1

# 27_InstSolManual_PDF_Part1 - RELATIVITY 27 3 A D 4 D 5 C 6...

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27-1 R ELATIVITY 27 Answers to Multiple-Choice Problems 1. A, B 2. B, C 3. A, D 4. D 5. C 6. A 7. B 8. B 9. D 10. A 11. C 12. B 13. A, C 14. A 15. E Solutions to Problems 27.1. Set Up: Let points and be at the front and back of the train, respectively. B lines up with and A lines up with when the lightening strikes at each end of the train, as shown in Figure 27.1. Figure 27.1 Solve: Simultaneous to an observer on the train at means light pulses from and arrive at at the same time. To an observer on the ground at O the light from has a greater distance to travel than light from so the observer at O will conclude that the pulse from started before the pulse from To the observer at O the bolt at A appeared to strike first. Reflect: Section 27.2 shows that if the two bolts are simultaneous to the observer on the ground, then an observer on the train measures that the bolt at struck first. 27.2. Set Up: Consider the distance traveled by the light to reach each wall. Solve: (a)
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