p39_026 - 26. (a) For the rst and second case (labeled 1...

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26. (a) For the first and second case (labeled 1 and 2) we have eV 01 = hc/λ 1 Φand eV 02 = hc/λ 2 Φ, from which h and Φ can be determined. Thus, h = e ( V 1 V 2 ) c ( λ 1 1 λ 1 2 ) = 1 . 85 eV 0 . 820 eV (3 . 00 × 10 17 nm / s)[(300 nm) 1 (400 nm) 1 ] =4 . 12 × 10 15 eV · s . (b) The work function is Φ=
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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