p40_011

# p40_011 - n i = 1 and n f = 2, 3, 4, and 5, in turn. We use...

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11. The energy levels are given by E n = n 2 h 2 / 8 mL 2 ,where h is the Planck constant, m is the mass of an electron, and L is the width of the well. The frequency of the light that will excite the electron from the state with quantum number n i to the state with quantum number n f is f =∆ E/h =( h/ 8 mL 2 )( n 2 f n 2 i ) and the wavelength of the light is λ = c f = 8 mL 2 c h ( n 2 f n 2 i ) . We evaluate this expression for
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Unformatted text preview: n i = 1 and n f = 2, 3, 4, and 5, in turn. We use h = 6 . 626 × 10 − 34 J · s, m = 9 . 109 × 10 − 31 kg, and L = 250 × 10 − 12 m, and obtain 6 . 87 × 10 − 8 m for n f = 2, 2 . 58 × 10 − 8 m for n f = 3, 1 . 37 × 10 − 8 m for n f = 4, and 8 . 59 × 10 − 9 m for n f = 5....
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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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