1178_Physics ProblemsTechnical Physics

1178_Physics ProblemsTechnical Physics - Chapter 42 P42.2...

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Chapter 42 519 P42.2 (a) λ min max = hc E Lyman ( n f = 1): min . == = hc E 1 1240 91 2 eV nm 13.6 eV nm (Ultraviolet) Balmer ( n f = 2): min . = hc E 2 13 6 365 eV nm 14 eV nm bg (UV) Paschen ( n f = 3): min . = 39 1 2 8 2 1 2 nm nm a f (Infrared) Bracket ( n f = 4): min . = 49 1 2 1 4 6 0 2 nm nm a f (IR) (b) E hc max min = Lyman: EE max . 13 6 1 eV ch Balmer: max . 340 2 eV Paschen: max . 151 3 eV Brackett: max . 0850 4 eV Section 42.2 Early Models of the Atom P42.3 (a) For a classical atom, the centripetal acceleration is a v r e rm E e r mv e r e e =− += 2 0 2 2 2 0 2 2 0 1 4 42 8 π ππ so dE dt e r dr dt ea c e c e e = = = ∈∈ F H G I K J 2 0 2 0 22 3 2 0 3 2 0 2 2 8 1 6 64 . Therefore, dr dt e rmc e 4 2 0 2223 12 . FIG. P42.3 (b) −∈=
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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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