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

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

Question # 2

Resolving power in mth order diffraction for grating is given by:

Question # 3

The velocity of light in vacuum can be changed by changing

Question # 4

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

Question # 5

In order to get interference using two light rays

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

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

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:

Question # 9

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

Question # 10

Monochromatic light means waves of:

Question # 11

Wave length of that color as compared to that of violet color is:

Question # 12

Resolving power in mth order diffraction for grating is given by:

Question # 13

Frequency of red color as compared to that of violet color is:

Question # 14

The property of light which does not change with the nature of the medium is:

Question # 15

The terms phase difference and path difference are:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
2 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
3 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
4 Laws of reflection and refraction can also be explained by:
A. Particle nature of light
B. Quantum nature of light
C. Wave nature of light
D. Complex nature of light
5 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
6 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
7 Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
A. Refraction
B. Reflection
C. Diffraction
D. Formation of spectrum
8 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
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 A line which represents the direction of travel of a wave is known as:
A. Spherical Wavefront
B. Locus
C. Ray
D. Either B or C

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