- #1

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**1. Homework Statement**

A ray of light passes from air into benzene. For its deviation angle δ = |θ

_{1}- θ

_{2}| to be 9.5°, what must be its angle of incidence? The refractive index of benzene is 1.501.

**2. Homework Equations**

Snell's law

**3. The Attempt at a Solution**

From Snell's law we have sin θ

_{1}= 1.501 sin θ

_{2}. Here θ

_{1}is the angle of incidence. We can rewrite θ

_{2}= θ

_{1}- 9.5 and substitute that into the equation to get

sin θ

_{1}= 1.501 sin (θ

_{1}- 9.5)

But how is it possible to solve for θ

_{1}from this equation?