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

A convex lens acts as diverging lens when the object is placed:

Question # 3

The terms phase difference and path difference are:

Question # 4

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

Question # 5

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Question # 6

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:

Question # 7

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

Question # 8

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 # 9

Huygen's principles states that:

Question # 10

A prism splits a beam of white light into seven component colors. This is so because

Question # 11

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

Question # 12

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

Question # 13

The wave nature of light was proposed by:

Question # 14

To sources are said to be coherent if they have:

Question # 15

In order to get interference using two light rays

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 To see the minor details of the object by microscope, it should have:
A. High magnifying power
B. High resolving power
C. Am objective of larger focal length
D. None of these
3 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
4 In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
A. Greater than
B. Smaller than
C. Equal to
D. None of these
5 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
6 In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
A. Bright
B. Dark
C. Any of A and B
D. None of these
7 Frequency of red color as compared to that of violet color is:
A. Equal
B. Smaller
C. Greater
D. None of these
8 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
9 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
10 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

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