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 has:

Question # 2

For the virtual image, option _______ is not correct:

Question # 3

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

Question # 4

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:

Question # 5

Wave length of that color as compared to that of violet color is:

Question # 6

The distance from eye to near point is taken as:

Question # 7

Speed of light in vacuum depends upon:

Question # 8

With age, least distance of distinct vision:

Question # 9

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

Question # 10

To sources are said to be coherent if they have:

Question # 11

Laws of reflection and refraction can also be explained by:

Question # 12

The focal length of convex lens having magnifying power of 5.55 is:

Question # 13

The terms phase difference and path difference are:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 To sources are said to be coherent if they have:
A. Same amplitude
B. Same wavelength
C. Definite phase relation with each other
D. None of them
3 Least distance of distinct vision of an old man possibly becomes:
A. A little less than 25 cm
B. A little more than 25 cm
C. Much less than 25 cm
D. None of these
4 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:
A. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
5 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
6 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
7 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
8 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
9 A prism splits a beam of white light into seven component colors. This is so because
A. Phase of different colors is different
B. Amplitude of different colors is different
C. Wavelength of different colors is different
D. Velocity of different colors is different
10 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these

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