Interference and Diffraction MCQ Questions and Answers Quiz

61. Interference pattern is observed in wedge-shaped film and bandwidth is noted. Now the angle of wedge is reduced. What will be the effect on bandwidth?

  1. Bandwidth increases
  2. Bandwidth decreases
  3. Bands will disappear
  4. There will not any effect

62. Interference pattern is observed in wedge-shaped film and bandwidth is noted. Now the thin film is replaced by the film of higher refractive index. What will be the effect on bandwidth?

  1. Bandwidth increases
  2. Bandwidth decreases
  3. Bands will merge
  4. There will not any effect

63. Interference pattern is observed in wedge-shaped film for monochromatic light. Now monochromatic light is replaced by white light. What will be the effect on interference pattern?

  1. It will turn to dark
  2. It will turn to bright
  3. Bands will disappear
  4. It will be a mixture of all colors

64. Interference pattern is observed in wedge-shaped film for monochromatic light. Now monochromatic light is replaced by white light. What will be the effect on interference pattern?

  1. It will turn to dark
  2. It will turn to bright
  3. Bands will disappear
  4. It will be a mixture of all colors

65. Light enters air from water. The angle of refraction will be

  1. Greater than the angle of incidence.
  2. Equal to the angle of incidence.
  3. Less than the angle of incidence.
  4. None of these

66. Light is

  1. an electromagnetic wave
  2. a form of energy visible to the human eye
  3. the same type of energy as an X ray
  4. all of the above

67. Light travels fastest

  1. In a vacuum
  2. through water
  3. Through glass
  4. through diamond

68. Newtons light illustrate the phenomenon of

  1. Interference
  2. Diffraction
  3. Dispersion
  4. Polarization

69. Newtons light illustrate the phenomenon of

  1. Interference
  2. Diffraction
  3. Dispersion
  4. Polarisation

70. Newtons rings are formed because of interference between the light Reflected from

  1. Upper surface of Plano-convex lens and lower surface of plane glass plate
  2. Lower surface of Plano-convex lens and upper surface of plane glass plate
  3. Lower and upper surface of Plano-convex
  4. Lower and upper surfaces of plane glass plate
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