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Relativity

The Special Theory of Relativity

 

The Principle of Relativity

This principle (accepted by Galileo and Newton) was extended by Einstein to include the laws concerning the propagation of electro-magnetic radiations (like light).

1. The laws of physics must be the same for all inertial observers.

2. The velocity of light is the same as measured by all inertial observers.

Although the Michelson-Morley results can be considered as proof of the constancy of the velocity of light, Einstein said that he had convinced himself of this fact before seeing the direct experimental evidence.


 

© David Hoult 2008