Polarization (Plane-Polarized Light: Brewster's Law, Uses of Plane-Polarized Light and Polaroid) NEET Questions

Physics - Optics

Polarization (Plane-Polarized Light: Brewster's Law, Uses of Plane-Polarized Light and Polaroid) MCQ Questions


1.
Brewster's law relates the polarizing angle (iₚ) of a transparent medium to its refractive index (μ) by which of the following relations?
A.
μ = tan(iₚ)
B.
μ = sin(iₚ)
C.
μ = cot(iₚ)
D.
μ = cos(iₚ)
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ANSWER :
A. μ = tan(iₚ)
2.
When light is incident at the Brewster's angle (polarizing angle), the angle between the reflected ray and the refracted ray is:
A.
180°
B.
90°
C.
45°
D.
0°
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ANSWER :
B. 90°
3.
The polarizing angle for glass having refractive index 1.5 is approximately:
A.
56.3°
B.
60°
C.
33.7°
D.
45°
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ANSWER :
A. 56.3°
4.
The polarizing angle for water (μ = 1.33) is approximately:
A.
37°
B.
45°
C.
53°
D.
60°
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ANSWER :
C. 53°
5.
At Brewster's angle, the reflected light is:
A.
Completely plane-polarized parallel to the plane of incidence
B.
Partially polarized
C.
Unpolarized
D.
Completely plane-polarized perpendicular to the plane of incidence
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ANSWER :
D. Completely plane-polarized perpendicular to the plane of incidence
6.
The refracted ray at Brewster's angle of incidence is:
A.
Completely plane-polarized
B.
Circularly polarized
C.
Unpolarized
D.
Partially polarized
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ANSWER :
D. Partially polarized