Chapter 33, Problem 79P

SSM emerges from the opposite face parallel to its initial direction but displaced sideways, as in Fig. 33-69. (b) Show that, for small angles of incidence θ, this displacement is given by

$x=t\theta \frac{n-1}{n},$

where n is the index of refraction of the glass and θ is measured in radians.

Figure 33-69 Problem 79.