Lecture_33 - PHYS 342 Fall 2010 Lecture 33: Time Dilation...

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PHYS 342 Fall 2010 Lecture 33: Time Dilation and Length Contraction Ron Reifenberger Birck Nanotechnology Center Purdue University Time dilation and length contraction are two of the most surprising implications of the Lorentz- instein transformations of special relativity Einstein transformations of special relativity. 1 Lecture 33
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What is Space? Space is what we measure with a measuring rod What is Time? Time is what we measure with a clock NOTE In some of the examples that follow, we will require the difference in coordinates for a air of events n other examples the 2 pair of events. In other examples, the coordinate of some object (like a clock) will remain the same. (see last lecture.)
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How do we tell time? ight Clocks (no mechanical parts) Light Clocks (no mechanical parts) http://webphysics.davidson.edu/course_material/py230l/relativity/relativity-ex1.htm 3
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Clock at rest S’ frame Time Dilation S S’ in S frame '' ' f xx v t yy   y y v f t 1 t 2 ' ' ' f zz vx t x x’ x’ 1 2 ' f tt c uv u    2 1' f vc u 1 11 2 ' ' f c Trust the equations: Takes you 1 22 2 ' ' f c from S ’ to S   21 2 1 ' t t    4
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Tabulating Some Numbers 2 2 2 11 ; 1 1 f f v c v     c    21 2 1 '' tt
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This note was uploaded on 12/08/2011 for the course PHYS 342 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

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Lecture_33 - PHYS 342 Fall 2010 Lecture 33: Time Dilation...

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