Suppose a person riding on top of a freight car shines asearchlight beam in the

Question

Suppose a person riding on top of a freight car shines asearchlight beam in the direction in which the train is travelling.Compare the speed of the light beam relative to the ground when: a. the train is at rest b. the train is moving How does the behaviour of the light beam differ from thebehaviour of a bullet fired in the same direction from the top ofthe freight car ? Suppose a person riding on top of a freight car shines asearchlight beam in the direction in which the train is travelling.Compare the speed of the light beam relative to the ground when: a. the train is at rest b. the train is moving How does the behaviour of the light beam differ from thebehaviour of a bullet fired in the same direction from the top ofthe freight car ?

Explanation / Answer

for light, the speed is the same (general principle of specialrelativity). for bullet, there is a difference. seen from the ground, the bulletis faster when fired from the moving train.

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