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

Light waves are:

Question # 2

Laws of reflection and refraction can also be explained by:

Question # 3

In case of point, source of light shape of wavefront is:

Question # 4

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 # 5

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

Question # 6

Speed of light in vacuum depends upon:

Question # 7

Stars twinkle due to

Question # 8

A magnifier gives an image which is:

Question # 9

The wave nature of light was proposed by:

Question # 10

Monochromatic light means waves of:

Question # 11

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

Question # 12

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

Question # 13

For the virtual image, option _______ is not correct:

Question # 14

Electromagnetic waves transport:

Question # 15

The distance from eye to near point is taken as:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
3 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
4 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
5 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:
A. Double the size
B. Same size
C. Half the size
D. None of these
6 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
7 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
8 The contrast in the fringes in an interference pattern depends upon
A. Fringe width
B. Relative difference intensities of the two sources
C. Distance between the slits
D. Wavelength
9 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
10 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller

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