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

Question # 2

Frequency of red color as compared to that of violet color is:

Question # 3

The least distance of distinct vision is:

Question # 4

A magnifier gives an image which is:

Question # 5

Light appears to travel in straight line because

Question # 6

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

Question # 7

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 # 8

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

Question # 9

Angle between the ray of light and the corresponding wavefront is:

Question # 10

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

Question # 11

For the virtual image, option _______ is not correct:

Question # 12

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

Question # 13

The terms phase difference and path difference are:

Question # 14

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

Question # 15

Electromagnetic waves transport:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
2 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
3 When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:
A. Greater, smaller
B. Smaller, smaller
C. Smaller, larger
D. Greater, larger
4 Resolving power in mth order diffraction for grating is given by:
A. R = N x m
B. None of these
C. R = m/N
D. R = N/m
5 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
6 If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
A. Fringe width will decrease
B. Fringe width will increase
C. Fringe width will remain unchanged
D. Fringe will become less intense
7 A convex lens acts as diverging lens when the object is placed:
A. Beyond 2F
B. At 2F
C. With focal length
D. Between F and 2F
8 The size of the image is maximum when its distance from the magnifying glass is:
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m
9 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
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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