An object moves in a direction parallel to its length with a velocity that approaches the velocity of light. The length of this object as measured by a stationary observer
A) approaches zero.
B) approaches infinity.
C) does not change.
D) increases slightly.

Question

Quizplus · Accepted Answer

According to the theory of relativity, as the velocity of an object approaches the speed of light, its length (as measured by a stationary observer) contracts or approaches zero in the direction of motion. This phenomenon is known as length contraction.

An Object Moves in a Direction Parallel to Its Length