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

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

Question # 2

The magnifier forms a virtual image of the object at:

Question # 3

In order to get interference using two light rays

Question # 4

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

Question # 5

The terms phase difference and path difference are:

Question # 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:

Question # 7

The image of the tip of a needle is never sharp because of

Question # 8

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

Question # 9

The wave nature of light was proposed by:

Question # 10

Stars twinkle due to

Question # 11

Light waves are:

Question # 12

A virtual image is formed when object is placed:

Question # 13

The property of light which does not change with the nature of the medium is:

Question # 14

Huygen's principles states that:

Question # 15

Monochromatic light means waves of:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
2 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
3 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
4 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
5 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
6 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
7 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
8 For the virtual image, option _______ is not correct:
A. 1/p = 1/f -1/q
B. 1/f = 1/p -1/q
C. 1/p=1/p-1/f
D. 1/p=1/f+1/q
9 The appearance of the colour in the soap (oil) film results from:
A. Dispersion
B. Interference
C. Reflection
D. Refraction
10 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them

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