A laserbeam is incident on the interface between air and some dielectric of index n. For small values of i show that t

A laserbeam is incident on the interface between air and some dielectric of index n. For small values of θ_i show that θ_t = θ_i/n. Use this and Eq. (4.42) to establish that at near-normal incidence [-r_⊥]_{θi ≈} (n - 1)/(n + 1).

r sin (0-0) sin (0 + 0) [4.42]