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 the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

Question # 2

Light appears to travel in straight line because

Question # 3

A line which represents the direction of travel of a wave is known as:

Question # 4

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

Question # 5

Speed of light in vacuum depends upon:

Question # 6

With age, least distance of distinct vision:

Question # 7

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

Question # 8

A ray passing through optical center of a lens, after refraction:

Question # 9

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

Question # 10

Huygen's principles states that:

Question # 11

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

Question # 12

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 # 13

A virtual image is formed when object is placed:

Question # 14

The magnifier forms a virtual image of the object at:

Question # 15

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The property of light which does not change with the nature of the medium is:
A. Frequency
B. Amplitude
C. Wavelength
D. None 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 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
4 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
5 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
6 The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
A. 1
B. 0.2
C. 2
D. 0.1
7 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
8 A convex lens acts as diverging lens when the object is placed:
A. Between F and 2F
B. At 2F
C. With focal length
D. Beyond 2F
9 The cause of mirage observed in deserts in bright sunlight is due to
A. Refraction of light
B. Reflection of light
C. Scattering of light
D. Total internal reflection of light
10 A ray passing through optical center of a lens, after refraction:
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C

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