Homeworks_2_and_3

Homeworks_2_and_3 - EE338 Physical Electronics Homework...

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EE338 Physical Electronics Homework Assignments #2, 3 Prof. Steve Cronin Due Feb. 2, 2010 Semiconductor Physics: 1. The work function of a material refers to the minimum energy required to remove an electron from the material. Assume that the work function of gold is 4.90 eV and that of cesium is 1.90 eV. Calculate the maximum wavelength of light for the photoelectric emission of electrons from gold and cesium. 2. (a) An electron is moving with a velocity of 2x10 6 cm/s. Determine the electron energy in eV, the momemtum, and the de Broglie wavelength (in angstroms). (b) The de Broglie wavelength of an electron is 125 angstroms. Determine the electron energy (in eV), the momentum and the velocity. 3. Consider the periodic table. (a) Determine three elements that have the following properties: (i) one valence electron, (ii) four valence electrons. What do the following elements (i) F, Cl, Br and (ii) He, Ne, Ar have in common? 4.
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Homeworks_2_and_3 - EE338 Physical Electronics Homework...

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