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

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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 6

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

Question # 7

According to Huygen's principle

Question # 8

A magnifier gives an image which is:

Question # 9

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:

Question # 10

To observe interference of light, the condition, which must be met with is that the sources must be:

Question # 11

For the virtual image, option _______ is not correct:

Question # 12

Electromagnetic waves transport:

Question # 13

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

Question # 14

Light has:

Question # 15

The wave nature of light was proposed by:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
2 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
3 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
4 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
5 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
6 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
7 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
8 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
9 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
10 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

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