S05exam1

# S05exam1 - Class Grade Distribution Score Distribution by...

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Class Grade Distribution Score Distribution by Question 0 10 20 30 40 50 60 70 80 90 100 Question 1234567891 0 1 1 First Exam Questions Avg. = 66 State the Pauli Exclusion principle. 1. No two particles, in an interactging system, can have the same quantum numbers. In the Bohr model of the hydrogen atom an electron makes a transition from the –3.4 eV energy state to the –13.6 eV state. What is the wavelength of the photon given emitted? 2. () ( ) 122nm m 122 . 0 eV 2 . 10 eV 24 . 1 m 10 1.22 m/s 10 3 Js 10 63 . 6 μ m) in ( eV 24 . 1 eV 10.2 eV 3.4 - eV 6 . 13 7 8 34 = = = × = × × = = = = = = µ λ ν λ λ λ hc h E

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How much energy is required to remove an electron from the conduction band of a semiconductor if the electron affinity is 4 eV, the Fermi energy is 5 eV, and the band gap is 1 eV? 3. E g =1eV χ =4 eV 4eV The electron wavevector k equals 10 10 m -1 . What is the electron momentum? 4. () ( ) Ns 10 06 . 1 m 10 Js 10 06 . 1 2 2 24 1 - 10 34 × = × = = = = k h h p h λ π What is the probability of finding an electron at the Fermi level?
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## This note was uploaded on 06/30/2010 for the course EECE 332 taught by Professor Constable during the Spring '08 term at Binghamton.

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S05exam1 - Class Grade Distribution Score Distribution by...

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