Question:
An unpolarised light beam strikes a glass surface at Brewster's angle. Then
An unpolarised light beam strikes a glass surface at Brewster's angle. Then
Updated On: Jan 13, 2026
- The reflected light will be partially polarised.
- The refracted light will be completely polarised.
- 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.
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The Correct Option is D
Solution and Explanation
Step 1: Understand Brewster’s Law
Brewster’s angle (\(\theta_B\)) is the angle of incidence at which light reflected from a surface is completely polarized. At this angle, the reflected and refracted rays are perpendicular to each other.
Step 2: Analyze the Reflection and Refraction
At Brewster’s angle, the reflected light is completely polarized in a direction perpendicular to the plane of incidence.
The refracted light is partially polarized because it consists of both components of polarization.
Step 3: Conclusion
The reflected light is completely polarized, while the refracted light is partially polarized.
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