Physics 106c: Electrodynamics
Problem Set 4
Solutions
Due: 4pm Friday, May 4, 2012
Short set 'cause midterm is nigh.
Remember: Late homework will be granted 50% credit up to one week late, unless you
have a note from the Dean or a health official.
Reading: Griffiths Chapter 7 and 9.
Problems:
1. Griffiths 9.16
2. Light is incident on a plane interface between two linear dielectrics. The incident ray’s
polarization is in the plane of incidence. Show that at Brewster’s angle of incidence the
reflected and transmitted rays are mutually perpendicular. Assume the permeabilities are
those of free space: μ1 = μ2 = μ0.