Physical Optics — Physics MCQs (Class 11)
Free chapter-wise Physics MCQs with answers for MDCAT, FSc and entry tests.
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#105 The device used to produce polarized light is called
A) Polarizer
B) Analyzer
C) Both polarizer and analyzer
D) Neither polarizer nor analyzer
#106 The device used to detect polarized light is called
A) Polarizer
B) Analyzer
C) Both polarizer and analyzer
D) Neither polarizer nor analyzer
#107 The law of Malus states that the intensity of polarized light transmitted through an analyzer is proportional to the square of the cosine of the angle between the transmission axes of the polarizer and analyzer.
A) \( I=I_0 \cos^2 \theta \)
B) \( I=I_0 \cos \theta \)
C) \( I=I_0 \sin^2 \theta \)
D) \( I=I_0 \sin \theta \)
#108 When unpolarized light is incident on a polarizer, the intensity of the transmitted light is
A) \( I_0 \)
B) \( I_0/2 \)
C) \( I_0/4 \)
D) Zero
#109 When polarized light is incident on an analyzer and the transmission axes are parallel, the intensity of the transmitted light is
A) \( I_0 \)
B) \( I_0/2 \)
C) \( I_0/4 \)
D) Zero
#110 When polarized light is incident on an analyzer and the transmission axes are perpendicular, the intensity of the transmitted light is
A) \( I_0 \)
B) \( I_0/2 \)
C) \( I_0/4 \)
D) Zero
#111 The Brewster’s law is given by
A) \( \tan \theta_p = n \)
B) \( \sin \theta_p = n \)
C) \( \cos \theta_p = n \)
D) \( \cot \theta_p = n \)
#112 The angle of polarization \( \theta_p \) is the angle at which
A) Reflected light is completely polarized
B) Refracted light is completely polarized
C) Both reflected and refracted light are completely polarized
D) Neither reflected nor refracted light is polarized
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