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Special Theory of Relativity by S. P. Puri

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2

Lorentz Transformation and Its Kinematic Consequences. Intervals and Causality

2.1  EINSTEIN’S POSTULATES OF SPECIAL THEORY OF RELATIVITY. PRINCIPLE OF RELATIVITY AND CONSTANCY OF VELOCITY OF LIGHT

According to the theory of electromagnetic field as developed by Maxwell and Lorentz, the velocity of propagation of light or any electromagnetic disturbance in free space is a quantity c given by c = 2.99792 × 1010 cm/s. According to the basic correctness of Maxwell–Lorentz equations, Eqs [1.10(a)][1.10(d)], and classical kinematical laws, it follows that there is a unique frame called ether frame, in which Maxwell’s equations are valid and light is propagated with velocity c (measured by an observer at rest relative to ether).

The laws of mechanics ...

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