Question

A really high-speed train moves in a direction parallel to its length with a speed that...

A really high-speed train moves in a direction parallel to its length with a speed that approaches the speed of light. The height of the train (Not length), as measured by a stationary observer on the ground,

A. decreases slightly.

B. increases slightly.

C. approaches zero.

D. does not change due to the motion.

E. approaches infinity.

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Answer #1

Option D is correct

i.e., The height of the train , as measured by a stationary observer on the ground , does not change due to the motion

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