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

Question # 2

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

Question # 3

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

Question # 4

The magnifier forms a virtual image of the object at:

Question # 5

Huygen's theory cannot explain

Question # 6

Huygen's principles states that:

Question # 7

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 # 8

The distance from eye to near point is taken as:

Question # 9

With age, least distance of distinct vision:

Question # 10

Light waves are:

Question # 11

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

Question # 12

The wave nature of light was proposed by:

Question # 13

The magnifier forms a virtual image of the object at:

Question # 14

A grating with high resolving power can distinguish _______ difference in wavelengths :

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
3 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
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 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
6 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
7 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
8 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
9 The cause of mirage observed in deserts in bright sunlight is due to
A. Refraction of light
B. Reflection of light
C. Scattering of light
D. Total internal reflection of light
10 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these

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