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

Electromagnetic waves transport:

Question # 2

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

Question # 3

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Question # 4

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

Question # 5

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

Question # 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:

Question # 7

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

Question # 8

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

Question # 9

With age, least distance of distinct vision:

Question # 10

Speed of light in vacuum depends upon:

Question # 11

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

Question # 12

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

Question # 13

According to Huygen's principle

Question # 14

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

Question # 15

Light appears to travel in straight line because

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 A convex lens acts as diverging lens when the object is placed:
A. Between F and 2F
B. At 2F
C. With focal length
D. Beyond 2F
3 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
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 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
6 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Smaller
B. Larger
C. Zero
D. None of these
7 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
8 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
9 Stars twinkle due to
A. The fact that they do not emit light continuously
B. The refractive index of earth's atmosphere fluctuates
C. The Star's atmosphere absorbs its light intermittently
D. None of these
10 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller

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