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

Question # 2

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

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

Light waves are:

Question # 6

Frequency of red color as compared to that of violet color is:

Question # 7

The property of light which does not change with the nature of the medium is:

Question # 8

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

Question # 9

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

Question # 10

The image of the tip of a needle is never sharp because of

Question # 11

Electromagnetic waves transport:

Question # 12

In the formula R = N x m for diffraction grating, N denotes:

Question # 13

Wave length of light, on the average, is given by:

Question # 14

The ratio of the size of the image to that of object is called:

Question # 15

The contrast in the fringes in an interference pattern depends upon

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
A. Greater than
B. Equal to
C. Smaller than
D. None of these
2 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
3 In case of point, source of light shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
4 The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
A. Greater than
B. Less than
C. Equal to
D. None of these
5 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None 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 Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
A. Gamma rays, micro waves, visible light
B. Radio waves, ultraviolet waves, X-rays
C. Ultraviolet rays, infrared rays, micro waves
D. Visible light, gamma rays, radio waves
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 terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
10 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

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