HMWR1 - eV; (b) a proton with a kinetic energy of 100 eV;...

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110A Physical Chemistry: Quantum Mechanics Homework #1: assigned 10/4/10; due 10/11/10 in class 1. Blackbody radiation and Wien displacement law (30 pts) 1.1 Explain what Wien displacement law states and derive Wien displacement law from Planck distribution law of blackbody radiation. Express Planck distribution law in terms of wavelengths. 1.2 In a thermonuclear explosion the fireball can reach temperatures of about 10 7 K. What value of λ max does this correspond to? (Use Wien displacement law). In which region of the spectrum is this wavelength found? 2. Bohr atom (30 pts) 2.1 Compute the de Broglie wavelength of : (a) an electron with a kinetic energy of 100
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Unformatted text preview: eV; (b) a proton with a kinetic energy of 100 eV; (c) an electron in the first Bohr orbit of a hydrogen atom. 2.2 Describe an experiment to observe so called de Broglie waves. 3. Photoelectric effect (40 pts) 3.1 Explain what a work function of a metal is. 3. 2 The workfunction of chromium is 4.40 eV; compute the kinetic energy of electrons emitted from a chromium surface irradiated with ultra-violet light of wavelength equal to 200 nm. 3.3 Describe a series of measurements that would provide you with a way of determining Planck constant. Which physical quantity does the Planck constant represent?...
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This note was uploaded on 10/15/2010 for the course CHE 110A taught by Professor Mccurdy during the Fall '09 term at UC Davis.

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