CBSE Class 12 Ray Optics and Optical Instruments Multiple Choice Questions with Answers. MCQ Questions Class 12 Ray Optics and Optical Instruments with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Ray Optics and Optical Instruments MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Ray Optics and Optical Instruments with Answers - Set - 4
Question 1:
Radio waves from an antenna travel with the velocity of:
(a) light
(b) sound
(c) ultrasonics
(d) supersonics
Correct Answer – (A)
Question 2 :
The air bubble inside water shine due to:
(a) Reflection
(b) Refraction
(c) T.l.R.
(d) None of these
Correct Answer – (C)
Question 3 :
When light travels from one medium to another, which of the following does not change?
(a) frequency
(b) refractive index
(c) velocity
(d) wavelength
Correct Answer – (A)
Question 4 :
On reflection from a denser medium, a light wave suffers a phase difference of:
(a) π
(b) π/2
(c) π/4
(d) 2π
Correct Answer – (A)
Question 5 :
A convergent lens will become less convergent in :
(a) oil
(b) water
(c) both of (a) and (b)
(d) none of these
Correct Answer – (B)
MCQ Questions Class 12 Ray Optics and Optical Instruments with Answers
Question 6 :
When a ray of light (white) enters a lens, undergoes a change is:
(a) wavelength
(b) velocity
(c) frequency
(d) both velocity and wavelength
Correct Answer – (D)
Question 7 :
Two lens of power -15 D and +5 D are placed in contact co-axially. The focal length of equivalent lens is:
(a) -10 cm
(b) -20 cm
(c) +10 cm
(d) None
Correct Answer – (A)
Question 8 :
The branch of optics dealing with the formation of images using the concept of straight line propagation of light is called:
(a) geometrical optics
(b) physical optics
(c) corpuscular optics
(d) quantum optics
Correct Answer – (D)
Question 9 :
A thin glass (RI = 3/2) lens has optical power of – 5D in air. Its optical power in a liquid medium with RI = 1.6 will be:
(a) -2.5 D
(b) 25 D
(c) -ID
(d) 0.625 D
Correct Answer – (D)
Question 10 :
A concave mirror of focal length f produces an image n times the size of the object. If the image is real then the distance of the object is:
(a) (n – 1) f
(b) (n + 1) f
(c) [(n + 1)/n]f
(d) [(n – 1)/n]f
Correct Answer – (C)
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