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

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

Question # 2

Light waves are:

Question # 3

Speed of light in vacuum depends upon:

Question # 4

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

Question # 5

A magnifier gives an image which is:

Question # 6

Light has:

Question # 7

Which one of the following can act approximately as a source of monochromatic light;

Question # 8

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Question # 9

The magnifier forms a virtual image of the object at:

Question # 10

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

Question # 11

To sources are said to be coherent if they have:

Question # 12

Stars twinkle due to

Question # 13

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

Question # 14

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

Question # 15

Least distance of distinct vision of an old man possibly becomes:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Smaller
B. Larger
C. Zero
D. None of these
2 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
3 The image of the tip of a needle is never sharp because of
A. Polarization of light
B. Interference of light
C. Diffraction of light
D. Reflection of light
4 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
5 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
6 The appearance of the colour in the soap (oil) film results from:
A. Dispersion
B. Interference
C. Reflection
D. Refraction
7 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
8 Least distance of distinct vision of an old man possibly becomes:
A. A little less than 25 cm
B. A little more than 25 cm
C. Much less than 25 cm
D. None of these
9 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
10 If the object is situated at focus of a convex lens, then its image is formed at:
A. F
B. 2F
C. Infinity
D. None of these

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