SG_Chap26 - 4/6/2009 Chapter 26 Relativity 26.1 Galilean...

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4/6/2009 1 Chapter 26 Relativity 26.1 Galilean Relativity A passenger in an airplane throws a ball straight up - move in a vertical path - same motion as when the - ball is thrown while at rest on the Earth - the law of gravity and equations of motion are obeyed There is a stationary observer on the ground -views the path to be a parabola - the ball has a velocity to the right equal to the velocity of the plane The two observers disagree on the shape of the ball’s path Both agree that the motion obeys the law of gravity and Newton’s laws of motion Both agree on how long the ball was in the air Conclusion: There is no preferred frame of reference for describing the laws of mechanics 22.2 Speed of light Results do not agree with experiments The observer should measure the speed of the pulse as v+c Actually measures the speed as c Galilean Relativity does not apply to experiments in electricity, magnetism, optics, and other areas Michelson-Morley Experiment Luminiferous Ether
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SG_Chap26 - 4/6/2009 Chapter 26 Relativity 26.1 Galilean...

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