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10. Wave optics Physics - 10. Wave optics

CBSE - STD 12 Science - Physics (CBSE - English Medium). 893 questions in this chapter.

Question types

10. Wave optics question types

893 questions across 1 question group — pick any mix to generate a Physics paper with step-by-step answer keys.

893
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1
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Sample Questions

10. Wave optics questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark
If the monochromatic source in Young's double slit experiment is replaced by white light, then
  • A
    There will be a central dark fringe surrounded by a few coloured fringes
  • ✓
    There will be a central bright white fringe surrounded by a few coloured fringes
  • C
    All bright fringes will be of equal width
  • D
    Interference pattern will disappear

Answer: B.

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Q 2M.C.Q (1 Marks)1 Mark
An unpolarised light beam strikes a glass surface at Brewster's angle. Then
  • A
    The refracted light will be completely polarised.
  • B
    Both the reflected and refracted light will be completely polarised.
  • ✓
    The reflected light will be completely polarised but the refracted light will be partially polarised.
  • D
    The reflected light will be partially polarised.

Answer: C.

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Q 3M.C.Q (1 Marks)1 Mark
For Young's double slit experiment, two statements are given below :

Statement $I:$ If screen is moved away from the plane of slits, angular separation of the fringes remains constant.

Statement $II:$ If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases.

In the light of the above statements, choose the correct answer from the options given below :

  • A
    Statement $I$ is false but Statement $II$ is true
  • B
    Both Statement $I$ and Statement $II$ are true
  • C
    Both Statement $I$ and Statement $II$ are false
  • ✓
    Statement $I$ is true but Statement $II$ is false

Answer: D.

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Q 4M.C.Q (1 Marks)1 Mark
In a Young's double slit experiment, a student observes $8$ fringes in a certain segment of screen when a monochromatic light of $600\,nm$ wavelength is used. If the wavelength of light is changed to $400\,nm$, then the number of fringes he would observe in the same region of the screen is:
  • A
    $8$
  • B
    $9$
  • ✓
    $12$
  • D
    $6$

Answer: C.

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Q 5M.C.Q (1 Marks)1 Mark
If the screen is moved away from the plane of the slits in a Young's double slit experiment, then the
  • A
    angular separation of the fringes increases
  • B
    angular separation of the fringes decreases
  • ✓
    linear separation of the fringes increases
  • D
    linear separation of the fringes decreases

Answer: C.

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