Announcements 12512 Prayer n 3 students still not

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

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

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

Setting up HW problem P 3. 1

Fresnel Eqn Summary: Eqns 3. 183. 21

Reading Quiz n 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 field amplitudes vs q p-polarization field amplitudes vs q t t r r intensities vs q T R Do you always intensities get a 180 phase shift in airglass reflections? vs q Brewster’s angle! T R

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

Reading Quiz n 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 n 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