Warm-Up Exercise 38

Due 10:00 am, Mon., Apr. 1

Physics 123, Winter Semester, 2012

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Did you carefully complete the reading assignment?
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Does a clock really run slower in a moving frame? Or does it just *appear* to run slower?

You race your friend around the block on your bicycle. The time it takes you depends on the frame of reference from which your race is observed. In which frame is the proper time measured?


The figure demonstrates how the rate of "light clock" depends on the frame from which it is observed. It runs slower in O's frame than in O prime's frame. Why is this? What else will "run slower"? Will chemical reactions run slower? Firing of neurons? Gravity? Explain.

Was there anything that you didn't understand in the reading assignment? If so, explain.

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