A really high-speed train moves in a direction parallel to its length with a speed that approaches the speed of light. The length of the train, as measured by a stationary observer on the ground,
A) is not affected by the motion.
B) increases due to the motion.
C) decreases due to the motion.
D) approaches infinity.

Question

Quizplus · Accepted Answer

According to the theory of relativity, objects appear to contract along the direction of motion as they approach the speed of light. This phenomenon is known as length contraction.

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