Question

According to special relativity, which of the following people would see me aging most slowly? (I am sitting)

• A. A person running by me at $6.0m/s$
• B. A person sitting next to me in a rocket travelling at half the speed of light
• C. A person viewing me from the top of a mountain
• D. A person beside me on a bus moving at $15m/s$
• E. All people would see me age at the same rate

Answer 1

The correct option is B A person sitting next to me in a rocket travelling at half the speed of light

A person sitting next to me in a rocket travelling at half the speed of light will see the person ageing more slowly, as faster an object is accelerated to, the higher the degree of time dilation effect relative to an object of lower speed.

Einstein's theory of relativity works on a human scale: the higher you are, the faster you age.