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

Question # 2

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:

Question # 3

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

Question # 4

The terms phase difference and path difference are:

Question # 5

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

Question # 6

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 7

The wave nature of light was proposed by:

Question # 8

The distance from eye to near point is taken as:

Question # 9

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

Question # 10

The size of the image is maximum when its distance from the magnifying glass is:

Question # 11

Which one of the following can act approximately as a source of monochromatic light;

Question # 12

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

Question # 13

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

Question # 14

The locus of all points in a medium having same phase of vibration is called

Question # 15

Least distance of distinct vision of an old man possibly becomes:

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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 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
3 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
4 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
5 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
6 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
7 In order to get interference using two light rays
A. The sources should be monochromatic and coherent
B. The sources should have the same frequency
C. Superposition should be linear
D. All of these
8 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
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 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these

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