Ch7 HW2 S2008 - 4/25/08 10:35 AM Ch7 HW2 S2008 Page 1 of 5

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Unformatted text preview: 4/25/08 10:35 AM Ch7 HW2 S2008 Page 1 of 5 http://www.webassign.net/v4cgikseiloff3@gatech/student.pl?a=20080425142847kseiloff3@gatech192168016 Ch7 HW2 S2008 (Homework) KRISTIN SEILOFF PHYS 2211 M & N Spring 08, section N05, Spring 2008 Instructor: Jennifer Curtis Description Vibrational energy levels; other quantized systems. Instructions Reading: Sections 7.4-7.8 Web Assign Current Score: 19 out of 21 Due: Friday, April 11, 200808:35 AM EDT 1. 0/2 points | 4/4 submissions The Franck-Hertz experiment involved shooting electrons into a low-density gas of mercury atoms and observing discrete amounts of kinetic energy loss by the electrons. Suppose instead a similar experiment is done with a very cold gas of atomic hydrogen, so that all of the hydrogen atoms are initially in the ground state. If the kinetic energy of an electron is 10.5 eV just before it collides with a hydrogen atom, how much kinetic energy will the electron have just after it collides with and excites the hydrogen atom? K final = .5 0.3 eV 2. 3/3 points | 2/4 submissions Suppose a collection of quantum harmonic oscillators occupies the lowest 4 energy levels, and the spacing between levels is 0.02 eV. What is the complete emission spectrum for this system? That is, what photon energies will appear in the emissions? Include all energies, whether or notcomplete emission spectrum for this system?...
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Ch7 HW2 S2008 - 4/25/08 10:35 AM Ch7 HW2 S2008 Page 1 of 5

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