ECAT Pre Engineering Physics Chapter 9 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

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

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Physics ECAT Pre Engineering Chapter 9 Physical Optics

00:00
Question # 1

The terms phase difference and path difference are:

Question # 2

Light waves are:

Question # 3

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

Question # 4

In order to get interference using two light rays

Question # 5

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

Question # 6

A magnifier gives an image which is:

Question # 7

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

Question # 8

The magnifier forms a virtual image of the object at:

Question # 9

Angle between the ray of light and the corresponding wavefront is:

Question # 10

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

Question # 11

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 12

The magnifier forms a virtual image of the object at:

Question # 13

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

Question # 14

Monochromatic light means waves of:

Question # 15

The appearance of the colour in the soap (oil) film results from:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
2 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
3 The appearance of the colour in the soap (oil) film results from:
A. Dispersion
B. Interference
C. Reflection
D. Refraction
4 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
5 A virtual image is formed when object is placed:
A. Within focal length of a convex lens
B. Near the focal point of a concave lens
C. Both A and B
D. Away from 2F of a convex lens
6 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
7 If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:
A. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
8 How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
A. The upper half of the image is cut off
B. The brightness of the image is reduced
C. The brightness of the image is increased
D. No effect at all
9 According to Huygen's principle
A. light travels in straight line
B. Light is a transvers wave
C. Light has dual nature
D. All points on the primary wave-front are the sources of secondary wavelets
10 In case of point, source of light shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these

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