NATS 1745 Lecture Notes - Lecture 13: Special Relativity, Null Result, Thought Experiment
15 Feb 2016
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Lecture 13 (jan 22): einstein & relativity historical context: physics puzzles at the end of the 1800"s frames of reference. Special relativity: physics in very particular situation. E. g. a person either not moving at all or moving at constant velocity. General relativity: takes account of all other situations such as accelerating or decelerating. Relativity we basically talk about frame of reference. Frames of reference: example on the slide: observer has a stationary frame of reference, man walking 1m/s constant velocity---frame of reference, if the girl throws the snowball in forward direction at 1. 5 m/s. The stationary observer sees the ball flying at 1 m/s + 1. 5 m/s = 2. 5 m/s: if the girl throws at the opposite direction. Mass is the same if stationary or moving. Length is the same if stationary or moving: if a light or flash light is shined (see pdf) newtonian physics same simple +/- with speed of light.
