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

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

Question # 2

To see the minor details of the object by microscope, it should have:

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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 # 9

Speed of light in vacuum depends upon:

Question # 10

Conventionally, all the distance p, q, f are measured from _____ of the lens:

Question # 11

The magnifier forms a virtual image of the object at:

Question # 12

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

Question # 13

The contrast in the fringes in an interference pattern depends upon

Question # 14

Electromagnetic waves transport:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Resolving power in mth order diffraction for grating is given by:
A. R = N/m
B. R = m/N
C. R = N x m
D. None of these
2 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
3 The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
A. Greater than
B. Less than
C. Equal to
D. None of these
4 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
5 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
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 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
8 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
9 The locus of all the points in the same phase of vibration is called:
A. Wave packet
B. Wave front
C. Wave number
D. None of them
10 In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
A. Greater than
B. Smaller than
C. Equal to
D. None of these

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