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Question
An unpolarised light beam strikes a glass surface at Brewster's angle. Then ______.
Options
both the reflected and refracted light will be completely polarised.
the reflected light will be completely polarised but the refracted light will be partially polarised.
the reflected light will be partially polarised.
the refracted light will be completely polarised.
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Solution
An unpolarised light beam strikes a glass surface at Brewster's angle. Then the reflected light will be completely polarised but the refracted light will be partially polarised.
Explanation:
At Brewster’s angle, the reflected light is entirely polarised perpendicular to the plane of incidence. This indicates that the electric field of the reflected light wave oscillates inside a single plane. However, the refracted light is not completely polarised.
