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

Huygen's theory cannot explain

Question # 2

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

Question # 3

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

Question # 4

The wave nature of light was proposed by:

Question # 5

For the virtual image, option _______ is not correct:

Question # 6

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

Question # 7

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

Question # 8

To sources are said to be coherent if they have:

Question # 9

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

Question # 10

The appearance of the colour in the soap (oil) film results from:

Question # 11

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

Question # 12

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

Question # 13

A virtual image is formed when object is placed:

Question # 14

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

Question # 15

Which one of the following can act approximately as a source of monochromatic light;

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The image of the tip of a needle is never sharp because of
A. Polarization of light
B. Interference of light
C. Diffraction of light
D. Reflection of light
2 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
3 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
4 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
5 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
6 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Smaller
B. Larger
C. Zero
D. None of these
7 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
8 Light appears to travel in straight line because
A. It is not absorbed by the atmosphere
B. It is refracted by the atmosphere
C. Its wavelength is very small
D. Its velocity is very large
9 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
10 The locus of all the points in the same phase of vibration is called:
A. Wave packet
B. Wave front
C. Wave number
D. None of them

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