Interference and Diffraction Objective Question and Answer
Interference and Diffraction Trivia Quizzes for Practice
Interference and Diffraction MCQ Questions for Practice
61. The angle of incidence for a wave
Correct Answer is: all of the above
62. The characteristic that distinguishes a laser beam from an ordinary light beam is
Correct Answer is: The coherence of the laser beam
63. The conditions for the production of constructive and destructive interference are reversed due to the fact that on striking the thin film
Correct Answer is: Two rays of splitted light undergo phase change of 180 degree
64. The critical angle for a beam of light passing from water into air is 48.8 degree. This means that all light rays with an angle of incidence greater than this angle will be
Correct Answer is: Partially reflected and partially transmitted
65. The dark lines constituting the absorption spectrum exhibited by sunlight are frequently called
Correct Answer is: Fraunhofer lines
66. The diffraction observed by diffraction grating can also be termed as
Correct Answer is: Single slit diffraction
67. The first reflecting telescope was built by
Correct Answer is: Isaac Newton
68. The grating used to observe, diffraction of visible light can have approximately
Correct Answer is: 15000 lines per cm
69. The interference in thin films is because
Correct Answer is: All of above
70. The number of lines on plane gratings is 5000. If it is illuminated by a wavelength of light 6000 Ao, how many orders will be visible?
Correct Answer is: 3
71. The phenomenon of diffraction can be understood using
Correct Answer is: Huygens principle
72. The phenomenon of Newtons rings can be used to check the
Correct Answer is: Wavelength of monochromatic light
73. The points of constructive interference of light are
Correct Answer is: Always bright
74. The principle on which fiber optics is based is
Correct Answer is: Total internal reflection
75. The Radius (or diameter) of bright rings in Newtons rings is
Correct Answer is: Directly proportional to the square root of odd numbers
