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

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Question # 1

Light waves are:

Question # 2

The distance from eye to near point is taken as:

Question # 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:

Question # 4

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

Question # 5

Huygen principle is used to determine:

Question # 6

Huygen's theory cannot explain

Question # 7

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 8

For the virtual image, option _______ is not correct:

Question # 9

The terms phase difference and path difference are:

Question # 10

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

Question # 11

Huygen's principles states that:

Question # 12

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

Question # 13

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

Question # 14

In the formula R = N x m for diffraction grating, N denotes:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 In order to get interference using two light rays
A. The sources should be monochromatic and coherent
B. The sources should have the same frequency
C. Superposition should be linear
D. All of these
2 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
3 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
4 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
5 In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
A. Bright
B. Dark
C. Any of A and B
D. None of these
6 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
7 The image of the tip of a needle is never sharp because of
A. Polarization of light
B. Interference of light
C. Diffraction of light
D. Reflection of light
8 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
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 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them

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