According to the special theory of relativity,if a 30-year old astronaut sent on a space mission is accelerated to speeds close to that of light,and then returns to Earth after 20 years as measured on Earth,what would be his biological age upon returning?
A)less than 50 years
B)50 years
C)more than 50 years
D)exactly 100 years

Question

Quizplus · Accepted Answer

According to the special theory of relativity, time slows down for objects that are moving at high speeds. Therefore, when the astronaut travels at speeds close to that of light, time for him will appear to slow down relative to time on Earth. This means that although 20 years have passed on Earth, the astronaut's biological age would be less than 50 years upon returning due to time dilation.

According to the Special Theory of Relativity,if a 30-Year Old