91. The points of constructive interference of light are

- Always bright
- may be bright or dark
- always dark
- neither bright nor dark

92. The principle on which fiber optics is based is

- refraction
- polarization
- Dispersion.
- Total internal reflection

93. The Radius (or diameter) of bright rings in Newtons rings is

- Directly proportional to the square root of odd numbers
- Inversely proportional to the square root of natural numbers
- Directly proportional to the square root of even numbers
- Directly proportional to the square root of natural numbers

94. The Radius (or diameter) of dark rings in Newtons rings is

- Directly proportional to the square root of odd numbers
- Inversely proportional to the square root of natural numbers
- Directly proportional to the square root of even numbers
- Directly proportional to the square root of natural numbers

95. The region of the electromagnetic spectrum immediately above the frequencies to which the human eye is sensitive is called

- IR
- Ultra-Violet
- RF
- Gamma ray

96. The speed of any mechanical wave as it propagates through a medium is dependent mainly on the

- frequency of the wave source
- wavelength
- period of the wave
- type of medium through which the wave travels

97. The speed of light in material A is 1.25 times as large as it is in material. What is the ratio of the refractive indices, ÂµA /ÂµB of these materials?

- 1.5
- 1
- 0.8
- 1.25

98. The wave nature of light is demonstrated by which of the following?

- The photoelectric effect
- Color
- The speed of light
- Diffraction

99. There are two types of diffraction Fresnel and ..........

- Michelson
- De Broglie
- Fraunhofer
- Huygens

100. To find prominent diffraction, the size of diffraction object should be

- greater than wavelength of light used
- comparable to order of wavelength of light
- less than wavelength of light used
- none of these

MCQ Multiple Choice Questions and Answers on Interference and Diffraction

Interference and Diffraction Trivia Questions and Answers PDF

Interference and Diffraction Question and Answer

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