Question

A rod of proper length l0 oriented parallel to the x-axis moves with speed 2c/3 along the x-axis in the s-frame, where c is the speed of the light in free space. The observer is also moving along the x-axis with speed c/2 with respect to the s-frame. The length of the rod as measured by the observer is

Answer 1

Let ∆t be a time interval measured by an observer at rest in S . (∆t is a proper time. ... The meter stick is moving with speed v along the x axis in S. To determine its length in S, ... •If the π meson moves with speed 0.95c with respect to the Earth, what is its ... The length L of the rod as measured by a stationary observer in S is.