A spaceship is moving past you at a speed very close to the speed of light. If you could somehow watch the people inside it over a long period of time, what would you conclude?
A. They are aging more rapidly than you.
B. Their mechanical clocks go slower than yours, but the people are aging at the same rate as you.
C. Their time is the same as your time.
D. They are aging more slowly than you.
Answer:D
A spaceship is moving past you at a speed very close to the speed of light. If you could somehow watch the people inside it over a long period of time, what would you conclude?
A. They are aging more rapidly than you. B. Their mechanical clocks go slower than yours, but the people are aging at the same rate as you. C. Their time is the same as your time. D. They are aging more slowly than you.