Interference and Diffraction MCQ Questions and Answers Quiz

41. Interference of light is evidence that

  1. The speed of light is very large
  2. light is a transverse wave
  3. light is electromagnetic in character
  4. Light is a wave phenomenon

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

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

43. 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

44. 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

45. 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

46. 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

47. 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

48. 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

49. Light travels fastest

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

50. Newtons light illustrate the phenomenon of

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