Physics Class 12 MCQ Wave Optics – Chapter 10

Practice some of the very important physics class 12 MCQ from Wave Optics and score good in your examination. Wave Optics is a scoring subject, so if you practice questions from it with complete dedication then your chances of improving your grades will definitely increase.

In this article, below we have provided with some important MCQs with Solutions for Wave Optics Chapter 10. Practice these questions for free from this page and make your concept of the chapter very strong, so that it may help you in getting good grades in your examinations.

Physics Class 12 MCQ Magnetism And Matter – Chapter 5

Physics Class 12 MCQ Electromagnetic Induction – Chapter 6

Physics Class 12 MCQ Wave Optics – Chapter 10

Ques 1: A plane wave passes through a convex lens. The geometrical shape of the wavefront that emerges is

  • plane
  • diverging spherical
  • converging spherical
  • none of these

converging spherical

Ques 2: When a wave undergoes reflection at a denser medium, its phase changes by

  • 00
  • 450
  • 900
  • 1800

1800

Ques 3: In YDSE, when separation between two slits is increased, fringe width

  • decreases
  • increases
  • remains the same
  • none of these

decreases

Ques 4: Three lights, red, violet and green are used successively in YDSE. Fringe width will be maximum for

  • red
  • violet
  • green
  • same for all

red

Ques 5: In YDSE, the intensity of central maximum is l. What will be the intensity at the same place when one of the slits is closed?

  • I
  • I/2
  • I/4
  • 2 I

I/4

Wave Optics Class 12 MCQs Questions with Solutions

Ques 6: What is the ratio of slit widths when amplitudes of light waves from them has a ratio 1:√2 ?

  • 1 : √2
  • √2 : 1
  • 1 : 2
  • 2 : 1

1 : 2

Ques 7: For an aperture of 2 mm and wavelength of 500 nm. Fresnel distance is

  • 5 m
  • 8 m
  • 10 m
  • 40 m

8 m

Ques 8: When diameter of objective of an astronomical telescope is doubled, its limit of resolution is

  • doubled
  • quadrupled
  • halved
  • unaffected

halved

Ques 9: Polarizing angle for a medium is 600. Its refractive index is

  • 1.732
  • 1
  • 1.414
  • 2

1.732

Ques 10: Which one of the following cannot be polarized ?

  • X-rays
  • radio waves
  • sound waves
  • light waves

sound waves

Ques 11: Which one of the following phenomena confirms that light waves are transverse ?

  • interference
  • diffraction
  • dispersion
  • polarization

polarization

Ques 12: A rays of light falls on a transparent slab of μ = 1.0. If reflected and refracted rays are mutually perpendicular, what is the angle of incidence ?

  • 450
  • 600
  • 300
  • 900

450

Ques 13: The angle between pass axis of polarizer and analyzer is 450. The percentage of polarized light passing through analyzer is

  • 100%
  • 50%
  • 25%
  • 75%

50%

Physics MCQs for Class 12 With Answers Chapter 10 Wave Optics

Ques 14: Unpolarized beam of light of intensity I0 is incident on a polarizer P1. Another polarizer P2 is held parallel to it such that its pass axis is oriented at an angle 600, then what percentage of light will emerge from the system :

  • 30%
  • 100%
  • 12.5%
  • 37.5%

12.5%

Ques 15: In a Young’s double slit experiment, the separation between the slits is 0.1 mm, the wavelength of light used is 600 nm and the interference pattern is observed on a screen 1 m away. Find the separation between bright fringes.

    • 6.6 mm
    • 6.0 mm
    • 6 m
    • 60 cm

    6.0 mm

Ques 16: Om the Young’s double slit experiment, the fringe pattern as seen on the screen is :

  • parabola
  • Hyperbola
  • ellipse
  • Spiral

Hyperbola

Ques 17: The light source used in Young’s bouble slit experiment are

  • Incoherent
  • Coherent
  • White light
  • Blue-green-red light

Coherent

Ques 18: What is the effect on the angular width of interference fringes in a Young’s double slit experiment when the screen is moved near to the plane of slits.

  • Increases
  • Decreases
  • Constant
  • Not defined

Constant

Ques 19: The phase difference between two waves at the place of constructive interference is given as a

  • multiple of π
  • multiple of (2n-1)π
  • even multiple of π
  • odd multiple of π

even multiple of π

Ques 20: The path difference between two waves at the place of destructive interference is given by :

  • multiple of λ
  • multiple of λ/2
  • even multiple of λ/2
  • odd multiple of λ/2

odd multiple of λ/2

Ques 21: Resolving Power of Microscope depends upon

  • Focal Length
  • Wavelength
  • Diameter
  • Wavelength, Diameter of lens

Wavelength, Diameter of lens

Wave Optics MCQ Questions for Class 12

Ques 22: Angular width of interference fringe depends on

  • Distance between Slit and Screen
  • Wavelength of light
  • Ration of the wavelength and Slit width
  • Width of Slit

Wavelength of light

Ques 23: Resolving Power of the telescope depends upon the

  • Diameter of circular aperture
  • Focal length
  • Magnification power
  • Refractive index

Diameter of circular aperture

Ques 24: In teh phenomena of Diffraction of light when the violet light is used in the experiment instead of red light then

  • Fringe width increases
  • No change in fridge width
  • Fringe width decreases
  • Colour pattern is formed

Fringe width decreases

Ques 25: Diffraction aspect is easier to notice in case of the sound waves than in case of the light waves because sound waves

  • Have longer wavelength
  • Shorter wavelength
  • Longitudinal wave
  • Transverse waves

Have longer wavelength

Ques 26: The wave-front due to source situated at infinity is

  • Spherical
  • plane
  • Cylindrical
  • Rectangular

plane

Ques 27: Colours apearing on a thin film of a soap bubble are due to

  • Diffraction
  • Refraction
  • Dispersion
  • Interference

Interference

Ques 28: For an aperture of size (d) illuminated by a parallel beam of light having wavelength λ, the Fresnel’s distance is

  • Z = d2
  • Z = d/λ
  • Z = d/λ2
  • Z = dλ

Z = d2

Ques 29: Unpolarized light is incident on a plane glass surface having refractive index √3. The angle of incidence at which reflected and refracted rays would become perpendicular to each other is

  • 150
  • 300
  • 450
  • 600

600

Ques 30: The shape of interference fringes in YDSE, when distance between slit and screen is very large as compared to fringe width is

  • straight lines
  • parabolic
  • circular
  • hyperbolic

straight lines

Physics Chapter Wise MCQ Questions and Answers

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physics 12 mcqWe hope you liked the questions provided above of Wave Optics Chapter 10 Physics Class 12. In case you want some additional stuff, you may contact us via comment box.

Updated: October 17, 2021 — 11:57 am

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