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

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

Question # 2

The distance from eye to near point is taken as:

Question # 3

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

Question # 4

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

Question # 5

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 # 6

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

Question # 7

Speed of light in vacuum depends upon:

Question # 8

A ray passing through optical center of a lens, after refraction:

Question # 9

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

Question # 10

To sources are said to be coherent if they have:

Question # 11

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

Question # 12

Light waves are:

Question # 13

Angle between the ray of light and the corresponding wavefront is:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.
A. Equal to
B. Greater than
C. Smaller than
D. None of these
2 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
3 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
4 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
5 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
6 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:
A. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
7 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
8 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
9 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
10 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these

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