Answer to Question #112876 in Physics for DEEPAK SINGH

Question

what are the postulates of special theory of relativity? drive Lorentz transformation equation with their help.

Answer 1

Answer:

Special relativity considers the relationship of physical processes only in inertial reference frames.

Postulates of the theory of relativity:

1. In inertial reference frames, all the laws of nature are the same.

2. The speed of light propagation in vacuum is the same in all inertial reference frames.

According to the theory of relativity there is a Lorentz reduction in length:

$l=l_0\sqrt{1-\dfrac{\upsilon^2}{c^2}};$

$l_0$ - length of the rod in the frame of reference, relative to which the rod is at rest;

$l$ - is the length of the rod in the frame of reference, relative to which the rod moves.

It should be noted that the size of a body decreases only along its motion, and the relativistic effect of reducing the length becomes noticeable only in the case of motion of the body at a speed comparable to the speed of light.