CBSE Class 12 Wave Optics Multiple Choice Questions with Answers. MCQ Questions Class 12 Wave Optics with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Wave Optics MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Wave Optics with Answers - Set - 4
Question 1:
A phase difference of 5π corresponds to a path difference (in terms of λ) of:
(a) 5λ
(b) 10λ.
(c) 5λ/2
(d) 2λ
Correct Answer – (C)
Question 2 :
In a Young’s double slit experiment the distance between the slit is 1 mm and the distance of screen from the slit is 1 m. If light of wavelength 6000 A is used then the fringe width is:
(a) 0.4 mm
(b) 0.5 mm
(c) 0.6 mm
(d) 0.8 mm
Correct Answer – (C)
Question 3 :
In Young’s double slit experiment, the central point on the screen is:
(a) bright
(b) dark
(c) first bright and later dark
(d) first dark and later bright
Correct Answer – (A)
Question 4 :
C.V. Raman was awarded the Nobel prize for his work associated with which of the following phenomenon of radiations?
(a) scattering
(b) diffraction
(c) interference
(d) polarisation
Correct Answer – (A)
Question 5 :
In vacuum, the speed of light depends upon :
(a) frequency
(b) velocity
(c) wave length
(d) None of these
Correct Answer – (D)
MCQ Questions Class 12 Wave Optics with Answers
Question 6 :
A person cannot see object clearly beyond 50 cm. The pow er of the lens to correct his vision is :
(a) +0.5 dioptre
(b) -0.5 dioptre
(c) -2 dioptre
(d) +2 dioptre
Correct Answer – (C)
Question 7 :
In Young’s double slit experiment the distance between the slit and the screen is doubled and the separation between the slit is reduced to half. The fringe width:
(a) is doubled
(b) become four time
(c) is halfed
(d) remain unchanged
Correct Answer – (B
Question 8 :
Light takes 10-10 to cross a glass slab. What is the thickness of the glass slab?
(a) 2 cm
(b) 3 cm
(c) 2.5 cm
(d) 3.5 cm
Correct Answer – (B)
Question 9 :
The fringe width (β) of a diffraction pattern and the slit width d are related as:
(a) β ∝ d
(b) β ∝ 1/d
(c) β ∝ √d
(d) β ∝ 1/d2
Correct Answer – (B)
Question 10 :
Polaroid glasses is used in sun glasses because :
(a) It reduces the light intensity to half on account of polarization
(b) It is fashionable
(c) It has good colour
(d) It is cheaper
Correct Answer – (A)
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