ECAT Pre Engineering Physics Chapter 9 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Question # 1

The magnifier forms a virtual image of the object at:

Question # 2

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

Question # 3

The cause of mirage observed in deserts in bright sunlight is due to

Question # 4

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

Question # 5

Electromagnetic waves transport:

Question # 6

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

Question # 7

If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:

Question # 8

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

Question # 9

Monochromatic light means waves of:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

A virtual image is formed when object is placed:

Question # 15

The locus of all the points in the same phase of vibration is called:

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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 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
3 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
4 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
5 If the object is situated at focus of a convex lens, then its image is formed at:
A. F
B. 2F
C. Infinity
D. None of these
6 If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
A. Fringe width will decrease
B. Fringe width will increase
C. Fringe width will remain unchanged
D. Fringe will become less intense
7 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
8 Frequency of red color as compared to that of violet color is:
A. Equal
B. Smaller
C. Greater
D. None of these
9 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
10 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

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