What minimal value can the Brewester angle have when light falls from air on to the surface of any dielectric?

Explanation

To find the minimal value of the Brewster angle when light falls from air onto the surface of any dielectric, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Brewster's Angle**: The Brewster angle (B) is the angle of incidence at which light with a particular polarization is perfectly transmitted through a dielectric surface, with no reflection. At this angle, the reflected and refracted rays are perpendicular to each other.

2. **Using the Relationship**: According to the definition of Brewster's angle, we can express it using the refractive indices of the two media involved. The relationship is given by:
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