One of two identical twins becomes an astronaut, while the other becomes a real estate broker. The astronaut embarks on high-speed space travel and is gone for several years. Upon the astronaut's return, the two twins reunite and compare their physical appearances. The result will be that
A) the real estate broker has aged less.
B) the astronaut has aged less.
C) both have aged the same.

Question

Quizplus · Accepted Answer

According to the theory of relativity, time dilation occurs when an object moves at high speeds. This means that time for the astronaut traveling at high speeds will appear to pass slower compared to the time for the real estate broker who stayed on Earth. Therefore, the astronaut will have aged less than the real estate broker when they reunite.

One of Two Identical Twins Becomes an Astronaut, While the Other