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

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

Question # 2

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

Question # 3

To sources are said to be coherent if they have:

Question # 4

If the object is situated at focus of a convex lens, then its image is formed at:

Question # 5

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

Question # 6

The ratio of the size of the image to that of object is called:

Question # 7

The velocity of light in vacuum can be changed by changing

Question # 8

A grating with high resolving power can distinguish _______ difference in wavelengths :

Question # 9

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

Question # 10

The locus of all the points in the same phase of vibration is called:

Question # 11

For the virtual image, option _______ is not correct:

Question # 12

A grating with high resolving power can distinguish _______ difference in wavelengths :

Question # 13

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 # 14

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

Question # 15

With age, least distance of distinct vision:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Laws of reflection and refraction can also be explained by:
A. Particle nature of light
B. Quantum nature of light
C. Wave nature of light
D. Complex nature of light
2 Light appears to travel in straight line because
A. It is not absorbed by the atmosphere
B. It is refracted by the atmosphere
C. Its wavelength is very small
D. Its velocity is very large
3 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
4 In an interference pattern of Young's double slit(YDS) experiment:
A. Bright fringesare wider than dark fringes
B. Dark fringes are wider than bright fringes
C. Both dark and bright fringes are of equal width
D.

Central fringes are wider than the outer fringes
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 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
7 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
8 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
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 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

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