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

To sources are said to be coherent if they have:

Question # 2

Electromagnetic waves transport:

Question # 3

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

Question # 4

The wave nature of light was proposed by:

Question # 5

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

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

Question # 8

The terms phase difference and path difference are:

Question # 9

According to Huygen's principle

Question # 10

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

Question # 11

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

Question # 12

Conventionally, all the distance p, q, f are measured from _____ of the lens:

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
3 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
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 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
6 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
7 Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
A. Gamma rays, micro waves, visible light
B. Radio waves, ultraviolet waves, X-rays
C. Ultraviolet rays, infrared rays, micro waves
D. Visible light, gamma rays, radio waves
8 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
9 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
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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