Lecture 31 - Recap of last lecture Postulate of Classical...

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Recap of last lecture Postulate of Classical relativity : Laws of mechanics (Newton’s laws ) are invariant in all inertial reference frames Crisis in classical relative : In classical relativity the velocity of light would be different in a frame moving with some finite velocity hence the laws of light propagation are frame dependent. Ditto for Maxwell’s equations; Brings back the idea that EM waves are travelling in some kind of medium called ether. But several high precision experiments looking for ether fail to find any; example the Michelson Morley experiment.
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Special Relativity Einstein’s two postulates: 1. All physical phenomena must be frame invariant (for Inertial frames) 2. The speed of light is independent of the motion of the source. (not unusual for waves which need a medium to travel and their velocity depends on the properties of the medium) Consider a stationary light source S and two observers one stationary (R 1 ) and one moving with velocity v (R 2 ). The first postulate says that these
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This note was uploaded on 01/27/2012 for the course PH 2233 taught by Professor Dipinkardutta during the Spring '11 term at Mississippi State.

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Lecture 31 - Recap of last lecture Postulate of Classical...

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