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

In case of point, source of light shape of wavefront is:

Question # 2

Monochromatic light means waves of:

Question # 3

A ray passing through optical center of a lens, after refraction:

Question # 4

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

Question # 5

The focal length of convex lens having magnifying power of 5.55 is:

Question # 6

The magnifier forms a virtual image of the object at:

Question # 7

For the virtual image, option _______ is not correct:

Question # 8

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

Question # 9

Wave length of light, on the average, is given by:

Question # 10

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

Question # 11

A virtual image is formed when object is placed:

Question # 12

Huygen's principles states that:

Question # 13

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 # 14

Huygen principle is used to determine:

Question # 15

With age, least distance of distinct vision:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 A line which represents the direction of travel of a wave is known as:
A. Spherical Wavefront
B. Locus
C. Ray
D. Either B or C
3 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
4 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
5 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
6 Which one of the following can act approximately as a source of monochromatic light;
A. Neon lamp
B. Fluorescent tube
C. Sodium lamp
D. None of these
7 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
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 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. 5 cm
B. 20 cm
C. 10 cm
D. 15 cm
10 The locus of all the points in the same phase of vibration is called:
A. Wave packet
B. Wave front
C. Wave number
D. None of them

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