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

Light has:

Question # 2

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

Question # 3

With age, least distance of distinct vision:

Question # 4

To see the minor details of the object by microscope, it should have:

Question # 5

The image of the tip of a needle is never sharp because of

Question # 6

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

Question # 7

Wave length of light, on the average, is given by:

Question # 8

Huygen's principles states that:

Question # 9

The cause of mirage observed in deserts in bright sunlight is due to

Question # 10

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

Question # 11

When a source of light isat very large distance,the shape of wavefront is:

Question # 12

In order to get interference using two light rays

Question # 13

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

Question # 14

Huygen principle is used to determine:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
2 In the formula R = N x m for diffraction grating, N denotes:
A. No. of lines/cm
B. No. of lines/meter
C. Total number of lines
D. None of above
3 In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
A. Greater than
B. Smaller than
C. Equal to
D. None of these
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 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
6 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
7 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
8 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
9 In case of point, source of light shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
10 In an interference pattern of Young's double slit(YDS) experiment:
A. Bright fringesare wider than dark fringes
B. Dark fringes are wider than bright fringes
C. Both dark and bright fringes are of equal width
D.

Central fringes are wider than the outer fringes

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