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

The contrast in the fringes in an interference pattern depends upon

Question # 2

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 3

Resolving power in mth order diffraction for grating is given by:

Question # 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:

Question # 5

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 # 6

In an interference pattern of Young's double slit(YDS) experiment:

Question # 7

In order to get interference using two light rays

Question # 8

Resolving power in mth order diffraction for grating is given by:

Question # 9

To observe interference of light, the condition, which must be met with is that the sources must be:

Question # 10

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

Question # 11

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

Question # 12

The distance from eye to near point is taken as:

Question # 13

Light has:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Laws of reflection and refraction can also be explained by:
A. Particle nature of light
B. Quantum nature of light
C. Wave nature of light
D. Complex nature of light
2 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
3 The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
A. Diffraction
B. Interference
C. Polarization
D. Dispersion
4 In case of point, source of light shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
5 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
6 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
7 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
8 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
9 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
10 Frequency of red color as compared to that of violet color is:
A. Equal
B. Smaller
C. Greater
D. None of these

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