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)approaches infinity.
B)approaches zero.
C)increases slightly.
D)decreases slightly.
E)does not change due to the motion.

Question

Quizplus · Accepted Answer

The height of the train, which is perpendicular to the direction of motion, does not change due to relativistic effects. Length contraction only affects dimensions parallel to the direction of motion.

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