Relativity Unit 2A: Quiz 01

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A short quiz about relativistic clock synchronization.

(Image source: Dave Jarvis: https://commons.wikimedia.org/wiki/File:Solar-system.png. Creative Commons Attribution-Share Alike 3.0 Unported. https://creativecommons.org/licenses/by-sa/3.0/deed.en)

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The moon is 3.84x10^8 meters from earth. At exactly noon Anastajia sends a light signal to Beowulf on the moon. Beowulf and Ana's clocks are synchronized. What should Beowulf's clock read when the light signal reaches him?

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Noon

1.28 seconds after noon

3 seconds after noon

3.84 seconds after noon

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At exactly 9:00am Anastajia sends a light signal to Beowulf. The signal reaches Beowulf when his clock reads 9:02am. Assuming that Anastajia's and Beowulf's clocks are both synchronized (and that they're in an inertial reference frame), how far apart are they? *

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2x10^8 m

3x10^8 m

6x10^8 m

3.6x10^10 m

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