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

A grating with high resolving power can distinguish _______ difference in wavelengths :

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 contrast in the fringes in an interference pattern depends upon

Question # 4

Wave length of that color as compared to that of violet color is:

Question # 5

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

Question # 6

Frequency of red color as compared to that of violet color is:

Question # 7

Light waves are:

Question # 8

To observe interference of light, the condition, which must be met with is that the sources must be:

Question # 9

The size of the image is maximum when its distance from the magnifying glass is:

Question # 10

In the formula R = N x m for diffraction grating, N denotes:

Question # 11

Conventionally, all the distance p, q, f are measured from _____ of the lens:

Question # 12

A convex lens acts as diverging lens when the object is placed:

Question # 13

In an interference pattern of Young's double slit(YDS) experiment:

Question # 14

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

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 If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:
A. Double the size
B. Same size
C. Half the size
D. None of these
2 The magnifier forms a virtual image of the object at:
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
3 The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
A. 1
B. 0.2
C. 2
D. 0.1
4 To sources are said to be coherent if they have:
A. Same amplitude
B. Same wavelength
C. Definite phase relation with each other
D. None of them
5 To see the minor details of the object by microscope, it should have:
A. High magnifying power
B. High resolving power
C. Am objective of larger focal length
D. None of these
6 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
7 A convex lens acts as diverging lens when the object is placed:
A. Between F and 2F
B. At 2F
C. With focal length
D. Beyond 2F
8 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
9 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
10 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct

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