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 terms phase difference and path difference are:

Question # 2

If the object is situated at focus of a convex lens, then its image is formed at:

Question # 3

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

Question # 4

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

Question # 5

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Question # 6

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

Question # 7

The locus of all points in a medium having same phase of vibration is called

Question # 8

To see the minor details of the object by microscope, it should have:

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

Light has:

Question # 14

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Question # 15

The magnifier forms a virtual image of the object at:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 To observe interference of light, the condition, which must be met with is that the sources must be:
A. Monochromatic
B. Phase coherent
C. Both of above
D. None of above
2 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
3 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
4 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
5 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
6 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
7 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
8 How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
A. The upper half of the image is cut off
B. The brightness of the image is reduced
C. The brightness of the image is increased
D. No effect at all
9 The size of the image is maximum when its distance from the magnifying glass is:
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m
10 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm

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