Ch7 HW1 S2008 - Ch7 HW1 S2008 4/25/08 10:34 AM Web Assign...

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4/25/08 10:34 AM Ch7 HW1 S2008 Page 1 of 6 http://www.webassign.net/v4cgikseiloff3@gatech/student.pl?y=20080425142835kseiloff3@gatech1286165155 Ch7 HW1 S2008 (Homework) KRISTIN SEILOFF Instructor: Jennifer Curtis Description Quantized energy; the quantum model of the interaction of light and matter. Instructions Reading: Sections 7.1-7.3 Web Assign Current Score: 20 out of 20 Due: Wednesday, April 9, 200808:35 AM EDT 1. 4/4 points | 2/4 submissions Match the description of a process with the corresponding diagram: a a Emission of a photon whose energy is E 3 - E 1 a. c c Absorption from an excited state (this hardly ever happens in dark-line spectrum absorption experiments at low temperatures, because an excited state drops back to the ground state so quickly that there is never a significant number of atoms in an excited state capable of absorbing the photon) b. b b Absorption of a photon whose energy is E 1 - E 0 ("dark-line" spectrum) c.
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Ch7 HW1 S2008 Page 2 of 6 http://www.webassign.net/v4cgikseiloff3@gatech/student.pl?y=20080425142835kseiloff3@gatech1286165155 d d Emission of a photon whose energy is E 2 - E 0 d. In drawing arrows to represent energy transitions, which of the following statements are correct? [x] [x] For absorption, the arrow points up. [x] [x] The tail of the arrow is drawn on the initial state. [_] [_] It doesn't matter which direction you draw the arrow as long as it connects the initial and final states. [x] [x] For emission, the arrow points down. [x] [x] The head of the arrow is drawn on the final state. 2. 4/4 points | 3/4 submissions A hydrogen atom is in state N = 3 , where N = 1 is the lowest energy state. What is K+U in electron volts for this atomic hydrogen energy state? E 3 = -1.51 -1.51 eV The hydrogen atom makes a transition to state N = 1 . What is K+U in electron volts for this lower atomic hydrogen energy state? E 1 = -13.61 -13.6 eV What is the energy in electron volts of the photon emitted in the transition from level N = 3 to N = 1 ? E
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This note was uploaded on 10/19/2009 for the course PHYSICS 2211M taught by Professor Schatz during the Spring '06 term at Georgia Institute of Technology.

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Ch7 HW1 S2008 - Ch7 HW1 S2008 4/25/08 10:34 AM Web Assign...

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