Question

When you return to Earth after a space mission, you will have aged

A. the same as someone who remained on Earth during your mission
B. the same as you would if you remained in space
C. slightly more than the person who remained on Earth
D. slightly less than a person who remains on Earth

Answer 1

The correct answer is option (d) i.e. When you return to Earth after a space mission, you will be aged slightly less than the person who remained on Earth.

The exact age difference depends on the details of the journey. This can be explained by the time dilation concept of Relativity.

Answer 2

Answer: The correct answer is "slightly less than a person who remains on Earth".

Step-by-step explanation:

Time dilation: It is the difference in the elapsed time which is measured by the two observer. It is due to the difference in the velocity relative to each other. It is the theory of special relativity.

Suppose, a clock is moving relative to an observer who is at rest. It measures the time slower than the clock at rest in the observer frame of reference.

In the given problem, when we return to Earth after a space mission then our age will have slightly less than a person who remains on Earth. It is due to the time dilation. In the space, we are accelerating or decelerating at high velocity or when we are coming to Earth. We are moving with respect to him for a person who is on the Earth.

Therefore, the correct option is (D).