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

To sources are said to be coherent if they have:

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

When a source of light isat very large distance,the shape of wavefront is:

Question # 6

The magnifier forms a virtual image of the object at:

Question # 7

A prism splits a beam of white light into seven component colors. This is so because

Question # 8

The cause of mirage observed in deserts in bright sunlight is due to

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

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 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
2 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
3 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
4 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
5 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
6 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
7 The magnifier forms a virtual image of the object at:
A. None of these
B. Least distance of distinct vision
C. Much farther than the least distance
D. Both A and B are correct
8 If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
9 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
10 The focal length of convex lens having magnifying power of 5.55 is:
A. 5.5 cm
B. 5 cm
C. 4.5 cm
D. 6 cm

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