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, as measured by a stationary observer on the ground,
A) increases slightly.
B) decreases slightly.
C) approaches infinity.
D) approaches zero.
E) does not change due to the motion.

Question

Quizplus · Accepted Answer

The height of the train does not change due to the motion because length contraction only affects the dimension parallel to the direction of motion, not perpendicular dimensions like height.

A Really High-Speed Train Moves in a Direction Parallel to Its