Due to length contraction, you see people in a spaceship passing by you as being slightly narrower than they normally appear. How do these people view you?
Solution 25E Length contraction depends on the relative speed between the observer and the object. In this case, the people who are passing by in a spaceship have relative speed with respect to my frame of reference. Similarly, from their frame of reference, I am having same speed but in opposite direction. Now since the length contraction is independent of the direction of the velocity and depends only on the relative speed, so from their frame of reference, my length will also appear contracted. The people in the spaceship will also view me as narrower due to length contraction.