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

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

Question # 2

The terms phase difference and path difference are:

Question # 3

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

Question # 4

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

Question # 5

Least distance of distinct vision of an old man possibly becomes:

Question # 6

Electromagnetic waves transport:

Question # 7

The wave nature of light was proposed by:

Question # 8

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 9

To observe interference of light, the condition, which must be met with is that the sources must be:

Question # 10

According to Huygen's principle

Question # 11

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

Question # 12

Speed of light in vacuum depends upon:

Question # 13

In the formula R = N x m for diffraction grating, N denotes:

Question # 14

Stars twinkle due to

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
2 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
3 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
4 If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:
A. Double the size
B. Same size
C. Half the size
D. None of these
5 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
6 If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
7 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
8 The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
A. Diffraction
B. Interference
C. Polarization
D. Dispersion
9 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
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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