A ray of light passes from glass to air at an angle of `19.5^@`. Calculate the angle of refraction, given refractive index of glass w.r.t. air is `3//2`.

Explanation

To solve the problem of finding the angle of refraction when a ray of light passes from glass to air, we will use Snell's law. Here’s a step-by-step solution:

### Step 1: Understand the Given Information
- The angle of incidence (i) when the light ray passes from glass to air is given as \( 19.5^\circ \).
- The refractive index of glass with respect to air (\( n_{glass} \)) is given as \( \frac{3}{2} \).
- The refractive index of air (\( n_{air} \)) is approximately \( 1 \).

### Step 2: Write Snell's Law
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