A ray of light is incident on a glass slab at grazing incidence. The refractive index of the material of the slab is given by `mu=sqrt((1+y)` . If the thickness of the slab is `d=2m`, determing the equation of the trajectory of the ray inside the slab and the coordinates of the point where the ray exits from the slab. Take the origin to be at the point of entry of the ray.

Explanation

To solve the problem step by step, we will follow the reasoning outlined in the video transcript while providing clear explanations for each step.

### Step 1: Understanding the Problem
We have a ray of light incident on a glass slab at grazing incidence. The refractive index of the slab is given by \( \mu = \sqrt{1 + y} \), and the thickness of the slab is \( d = 2 \, \text{m} \). We need to find the equation of the trajectory of the ray inside the slab and the coordinates of the exit point.

### Step 2: Applying Snell's Law
Using Snell's Law, we have:
\[
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