1101_Physics ProblemsTechnical Physics

1101_Physics ProblemsTechnical Physics - 442 P39.20...

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442 Relativity P39.20 (a) When the source moves away from an observer, the observed frequency is ff cv s s obs source = + F H G I K J 12 where vv s = source . When vc s << , the binomial expansion gives v c v c v c v c v c s s ss s s s + F H G I K J =− F H G I K J L N M O Q P + F H G I K J L N M O Q P ≈− F H G I K J F H G I K J F H G I K J 11 1 2 1 2 1. So, v c s obs source F H G I K J The observed wavelength is found from cf f == λλ obs obs source : λ obs source obs source source obs =≈ = = F H G I K J = F H G I K J f f f fv c s s s s s 1 1 1 1 1 1 bg Since −≈ v c s , v c source . (b) c c source nm 397 nm = F H G I K J = F H G I K J = 20 0 00504 . . *P39.21 For the light as observed f c f c v c v c v c obs obs source source source obs nm 520 nm ms + = + + + += = = × 1 1 1 1 1 1 650 1 1 125 1562 1 1 562 1 562 0562 2562 0220 659 10 2 7 .. . . . Section 39.5 The Lorentz Transformation Equations *P39.22 Let Suzanne be fixed in reference from S and see the two light-emission events with coordinates x 1 0 = ,
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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