Question

Marks: 2
The time taken by the space craft moving at a speed equal to half the velocity of light to go from star A to star B is 2 years as calculated at the Earth station. Which of the following is correct for the time measured by the astronaut in the space craft to reach the star B?
Choose one answer.
a. 1 year
b. less than 2 years
c. 2 years
d. more than 2 years

Answer 1

b. less than 2 years

Review the relativistic
"twin paradox"

The elapsed time for the high speed spacecraft (as measured by its own clock) is always less.