Chapter 42539P42.62(a)The length of the pulse is ∆∆Lct=.(b)The energy of each photon isEhcγλ=so NEEEhc==.(c)VLd=∆π24nNVct dEhcFHGIKJFHGIKJ42∆*P42.63The fermions are described by the exclusion principle. Two of them, one spin-up and one spin-down, will be in the ground energy level, withdLNN12, 2Lhp, and phL=2KmvpmhmL=12282222.The third must be in the next higher level, withdLNN, =L, and phL=KpmhmL22222.The total energy is thenhmLhmLhmLhmL2222222288234++=.P42.64∆∆zatFmtdB dzmxvzzzFHGIKJ=FHGIKJ2020221µbgandzeem==2dBdzmzvmxedBdzzez×××⋅=−−−2108 166 10102 911 101 001 60 101 05 1003890222734311934∆∆afejejejejejej=....kgmm skgm CJsTm2P42.65We useψπ2031202140sraraea f=−FHGIKJ−−.By Equation 42.24,PrrraraeFHGIKJ−FHGIKJ−4182203020πψ.(a)dP rdrrararaarararaaea fFHGIKJ−FHGI
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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 .