Assignment 8 - University of Florida Department of Physics...

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University of Florida Department of Physics PHY3101, Fall 2009 Introduction to Modern Physics Homework 8 - Due Fri, Feb 26 2009 Student Name: ( please print large and legibly. No UFID is necessary. ) Total: / 25 points.
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Physics 3101, HW#8, Fri, Feb 26 2009 Name: Problem 1: The Uncertainty Principle (4 points) Show that the relation Δ p s Δ s > ~ can be written Δ L Δ φ > ~ for a particle moving in a circle about the z axis, where p s is the linear momentum tangential to a circle, s is the arc length, and L is the angular momentum. How accurately can the angular position of the electron be specified in the Bohr atom? 1
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Name: Problem 2: The Uncertainty Principle (3 points) Neutrons and protons in atomic nuclei are confines within a region whose di- ameter is about 10 - 15 m. (a) At any given instant, how fast might an individual proton or neutron be moving? ( 1 points ) (b) What is the approximate kinetic energy of a neutron that is localized to within such a region (
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Assignment 8 - University of Florida Department of Physics...

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