Physics, Volume 2
Physics, Volume 2
11th Edition
ISBN: 9781119460176
Author: CUTNELL, John D., Johnson, Kenneth W., YOUNG, David, Stadler, Shane
Publisher: WILEY
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Chapter 28, Problem 2FC
To determine

The person who measures the proper time between two flashes of light.

Expert Solution & Answer
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Answer to Problem 2FC

The correct option is (a) A worker standing still on the road.

Explanation of Solution

The driver in a car who is approaching at a constant velocity is not in rest with respect to light and hence driver cannot measure the proper time between two flashes. The worker who is standing still on the road is at rest with relative to the light and thus, the worker measures the proper time between two flashes.

Conclusion:

Thus, the correct option is (a) A worker standing still on the road.

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