A ray of light falls on a glass slab at an incident angle of `45^(@)` and refracted at angle of `30^(@)`.
What is the refractive index of the glass with respect to air ?

Explanation

To find the refractive index of glass with respect to air, we can use Snell's Law, which states:

\[ n_1 \sin(i) = n_2 \sin(r) \]

Where:
- \( n_1 \) is the refractive index of the first medium (air),
- \( n_2 \) is the refractive index of the second medium (glass),
- \( i \) is the angle of incidence,
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