Question: Figure 30.23 shows light passing through a spherical raindrop, undergoing two refractions and total internal reflection, resulting in an angle f between the incident and
Figure 30.23 shows light passing through a spherical raindrop, undergoing two refractions and total internal reflection, resulting in an angle f between the incident and outgoing rays. Show that f = 4 sin-1 (sin ?/n) - 2?, where ? is the incidence angle.

Incident ray B 180 - 4 Exiting ray FIGURE 30.23 Problem 55
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