Ray Optics And Optical Instruments Class 12 Mcq in English

Ray Optics And Optical Instruments Class 12 Mcq in English | Class 12 Physics Mcq In English | ray optics class 12 mcqs with answers | ray optics class 12 mcq pdf Download | class 12 physics chapter wise objective questions in English

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Ray Optics And Optical Instruments Class 12 Mcq in English

1. The phase difference between the electric and the magnetic field vectors in electromagnetic waves is

(A) π/4
(B) π/2
(C) π
(D) Zero

Show Answer

(D) Zero

2. Which of the following cannot be polarised ?

(A) radiowaves
(B) transverse waves
(C) sound waves
(D) X-rays

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3. Light year is the unit of

(A) distance
(B) time
(C) intensity of light
(D) None

Show Answer

(A) distance

4. The refractive indices (R.I.) of glass and water with respect to air are 3/2 and 4/3 respectively. The R.I. of glass w.r. to water is

(A) 8/9
(B) 9/8
(C) 7/6
(D) 2

Show Answer

(B) 9/8

5. The angle of minimum deviation for an equilateral glass prism is 30°. Refractive index of the prism is

(A) 1/√2
(B) √3
(C) 1/3
(D) none

Show Answer

(B) √3

6. 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) – 1D
(D) 0.625

Show Answer

(D) 0.625

7. When a polaroid is rotated, the intensity of light varies but never reduces to zero. It shows that the incident light is

(A) unpolarised
(B) completely plane polarised
(C) partially plane polarised
(D) None

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8. wo lens of power -15D and + 5D are placed in contact co-axially. The focal length of equivalent lens is

(A) – 10 cm
(B) – 20 cm
(C) + 10 cm
(D) none

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(A) – 10 cm

9. The air bubble inside water shine due to

(A) Reflection
(B) Refraction
(C) T.I.R.
(D) None

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10. Far point of a myopic eye is 40 cm. The dioptic power of a corrective lens is

(A) 40D
(B) – 4D
(C) – 2.5 D
(D) None

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11. The angle of deviation for a prism is greatest for

(A) violet
(B) red
(C) orange
(D) yellow

Show Answer

(A) violet

12. A double convex air bubble in water behaves as

(A) Convergent lens
(B) divergent lens
(C) plane slab
(D) concave mirror

Show Answer

(B) divergent lens

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Pattern Based	Bihar Board, Patna
Class	12^thor Inter
Stream	Science
Category	Class 12 Physics Mcq
Chapter Name	Ray Optics And Optical Instruments
Subject	Physics Class 12th
Class 12^th English Summary	BSEB Class 12th English Summary
Class 10^th Science All Chapter Objective Question	Click Hare
Type Of Question	Objective Question \|\| 01 Marks
Script	Hindi And English Medium
Published On	Bihari Academy

Ray Optics And Optical Instruments Class 12 Mcq in English

Ray Optics And Optical Instruments Class 12 Mcq in English

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