Assignment 4 - University of Florida Department of Physics...

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Unformatted text preview: University of Florida Department of Physics PHY3101, Fall 2009 Introduction to Modern Physics Homework 4 - Due Jan 29, 2010 Student Name: ( please print large and legibly. No UFID is necessary. ) Total: / 20 points. Physics 3101, HW#4, Jan 29, 2010 Name: Problem 1: The Bohr Model (3 points) The radius of the n = 1 orbit in the hydrogen atom is a = 0 . 053 nm . (a) Compute the radius of the n = 6 orbit. ( 2 points ) (b) Compute the radius of the n = 6 orbit in singly ionized helium ( He + ), which is hydrogenlike, i.e., it has only a single electron outside the nucleus. ( 1 points ) 1 Physics 3101, HW#4, Jan 29, 2010 Name: Problem 2: The Bohr Model (5 points) An atom in an excited state will on average undergo a transition to a state of lower energy in about 10- 8 s . If the electron in a doubly ionized lithium (Li +2 , which is hydrogenlike) is placed in the n = 4 state, about how many revolutions around the nucleus does it make before undergoing a transition to a lower energy state?...
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Assignment 4 - University of Florida Department of Physics...

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