Assignment 2 - University of Florida Department of Physics...

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University of Florida Department of Physics PHY3101, Fall 2009 Introduction to Modern Physics Homework 2 - Due Fri, Jan 15 2010 Student Name: ( please print large and legibly. No UFID is necessary. ) Total: / 20 points.
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Physics 3101, HW#2, Fri, Jan 15 2010 Name: Problem 1: The Electron’s Charge (5 points) One variation of the Millikan oil drop apparatus arranges the electric field horizontally, rather than vertically, giving charged droplets acceleration in the horizontal direction. The result is that the droplet falls in a straight line that makes an angle θ with the vertical. Show that sin θ = q E /bv 0 t where v 0 t is the terminal speed along the angled path. 1
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Physics 3101, HW#2, Fri, Jan 15 2010 Name: Problem 2: Blackbody radiation (5 points) As noted in the chapter, the cosmic microwave background radiation fits the Planck equation for a blackbody at 2.7 K. (a) What is the wavelength at the maximum intensity of the spectrum of the background radiation? ( 2 points ) (b) What is the frequency of the radiation at the maximum? (
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Assignment 2 - University of Florida Department of Physics...

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