ECAT Pre Computer Science Chapter 9 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 9 Physical Optics

Try The MCQ's Test For ECAT Physics Chapter 9 Physical Optics

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ECAT Physics Chapter 9 Physical Optics

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Question # 1

The contrast in the fringes in an interference pattern depends upon

Question # 2

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Question # 3

The terms phase difference and path difference are:

Question # 4

The magnifier forms a virtual image of the object at:

Question # 5

Light has:

Question # 6

Resolving power in mth order diffraction for grating is given by:

Question # 7

For the virtual image, option _______ is not correct:

Question # 8

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

Question # 9

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 10

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

Question # 11

The ratio of the size of the image to that of object is called:

Question # 12

According to Huygen's principle

Question # 13

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Question # 14

When the object lies between F and 2F, the image formed by is formed at:

Question # 15

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
A. Greater than
B. Smaller than
C. Equal to
D. None of these
2 Resolving power in mth order diffraction for grating is given by:
A. R = N x m
B. None of these
C. R = m/N
D. R = N/m
3 The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.
A. Equal to
B. Greater than
C. Smaller than
D. None of these
4 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
5 In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
A. Greater than
B. Equal to
C. Smaller than
D. None of these
6 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
7 The contrast in the fringes in an interference pattern depends upon
A. Fringe width
B. Relative difference intensities of the two sources
C. Distance between the slits
D. Wavelength
8 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
9 A convex lens acts as diverging lens when the object is placed:
A. Beyond 2F
B. At 2F
C. With focal length
D. Between F and 2F
10 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these

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