What is Brewster's law ? What will be the refractive index of a transparent medium with a polarising angle of `60^(@)` ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Brewster's Law:**
Brewster's Law states that when unpolarized light is incident on a transparent medium at a specific angle known as the polarizing angle (Ip), the reflected light is completely polarized perpendicular to the plane of incidence. The relationship is given by the formula:
\[ \mu = \tan(I_p) \]
where \( \mu \) is the refractive index of the medium and \( I_p \) is the polarizing angle.
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