# PH505 HW #6

*due 5pm Nov 12, 2010*

#### Reading assignment

Chpt 22 sections

- 22.1
- 22.2.2 (F does not contain x explicitly)
- 22.5.1 (Fermat's principle in optics)

#### Light ray through a graded dielectric (10pts)

Problem 22.3. Only the first part of the question is required (i.e. prove that the equation of the light ray satisfiesâ€¦)