Announcements 1/25/12 Prayer 3 students still not getting credit for clicker quizzes. Please check your scores online to make sure you’re not one of them.

Which plane is which Plane of incidence s vs p polarizations Plane of the surface boundary conditions

Fresnel Equations, summary If near perpendicular (1-D problem) For arbitrary angle with Intensity coefficients

Setting up HW problem P3.1

Fresnel Eqn Summary: Eqns 3.18-3.21

Reading Quiz Brewster’s angle occurs when qi and qt Are equal Are in a 2:1 ratio Sum to 90 Sum to 45

Plots for air (n=1) to glass (n=1.5) s-polarization p-polarization field amplitudes vs q field amplitudes vs q r t r t intensities vs q intensities vs q Brewster’s angle! Do you always get a 180 phase shift in air- glass reflections? R T R T

Reading Quiz Total internal reflection happens for: s-polarized light p-polarized light Both polarizations

Reading Quiz During total internal reflection when light strikes a glass-air interface (from the glass side), the electric field in the air just outside the glass is called the: Evanescent wave Fluorescent wave Optometric wave Reduction wave Vanishing wave

Total internal reflection

Reading Quiz When light strikes an air-metal interface, a complex index of refraction for the metal will give rise to a complex reflection coefficient True False

Reflection from a metallic surface