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A light ray is incident on a glass slab it is partially reflected and partially transmitted. Then the reflected ray is

1. completely polarised and highly intense.
2. partially polarised and poorly intense
3. partially polarised and highly intense
4. completely polarised and poorly intense.

Correct answer: completely polarised and poorly intense.

Solution

At Brewster’s angle, the reflected ray is completely plane polarised because the reflected and refracted rays are perpendicular. Since most of the incident light is transmitted into the glass, the reflected ray has low intensity.

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