ECAT Pre Engineering Physics Chapter 10 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 10 Optical Instruments

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 10 Optical Instruments

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Physics ECAT Pre Engineering Chapter 10 Optical Instruments

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Question # 1

Electromagnetic waves transport

Question # 2

In YDS experiment, fringe spacing means the distance between two consecutive _________ fringes

Question # 3

Wavelength of light, on the average, is given by

Question # 4

Monochromatic light means wave of

Question # 5

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

Question # 6

The appearance of colours in the soap (or oil) film results from

Question # 7

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

Question # 8

In case of point source of light, shape of wavefront is

Question # 9

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

Question # 10

The wave nature of light was proposed by

Question # 11

Huygen's principle states that

Question # 12

Angle between ray of light and the corresponding wavefront is

Question # 13

In an interference pattern of Young's Double Slit (YDS) experiment

Question # 14

The appearance of colours in the soap (or oil) film results from

Question # 15

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

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Sr.# Question Answer
1 To observe interference of light, the condition, which must be met with is that the sources must be
A. Monochromatic
B. Phase coherent
C. Both of above
D. None of above
2 Two sources are said to be coherent if they have
A. Same amplitude
B. Same wavelength
C. Definite phase relation with each other
D. None of them
3 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
4 In an interference pattern of Young's Double Slit (YDS) experiment
A. Bright fringes are 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
5 Angle between ray of light and the corresponding wavefront is
A. 00
B. 600
C. 900
D. 1200
6 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
7 Monochromatic light means wave of
A. Same frequency
B. Same colour
C. Same Wavelength
D. All of them
8 Light waves are
A. Mechanical waves
B. Electromagnetic waves
C. Any of above
D. None of above
9 In case of constructive interference of two waves, the amplitude of the resultant wave is __________ either of the waves
A. Greater than
B. Equal to
C. Smaller than
D. None of these
10 Huygen's principle states that
A. Light travels in straight line
B. Light has dual nature
C. Either of these
D. None of these
11 The terms phase difference and path difference are
A. Same
B. Different
C. Equal
D. none of these
12 Huygen principle is used to determine
A. Speed of light
B. Location of wavefront
C. About polarized and unpolarized light
D. None of them
13 Speed of light in vacuum depends upon
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
14 The locus of all the points in the same phase of vibration is called
A. Wave pocket
B. Wavefront
C. Wave number
D. None of these
15 Light has
A. Wave nature
B. Dual nature
C. Particle nature
D. None of them

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