ECAT Pre General Science Chapter 10 online mcq test with answers for Physics chapter 10 (Optical Instruments)

Question # 1

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

Bright fringes are wider than dark fringes A
Dark fringes are wider than bright fringes B
Both dark and bright fringes are of equal width C
Central fringes are wider than the outer fringes D

Question # 2

Huygen principle is used to determine

Speed of light A
Location of wavefront B
About polarized and unpolarized light C
None of them D

Question # 3

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

Bright A
Dark B
Any of A or B C
None of these D

Question # 4

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

Wave pocket A
Wavefront B
Wave number C
None of these D

Question # 5

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

Spherical A
Cylindrical B
Plane C
None of above D

Question # 6

Huygen's principle states that

Light travels in straight line A
Light has dual nature B
Either of these C
None of these D

Question # 7

Angle between ray of light and the corresponding wavefront is

0⁰ A
60⁰ B
90⁰ C
120⁰ D

Question # 8

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

Dispersion A
Interference B
Reflection C
Refraction D

Question # 9

Frequency of red colour as compared to that of violet colour is

Equal A
Smaller B
Greater C
None of these D

Question # 10

Light has

Wave nature A
Dual nature B
Particle nature C
None of them D

Question # 11

Two sources are said to be coherent if they have

Same amplitude A
Same wavelength B
Definite phase relation with each other C
None of them D

Question # 12

Wavelength of red colour as compared to that of violet colour is

Smaller A
Longer B
Equal C
None of these D

Question # 13

The wave nature of light was proposed by

Newton A
Thomas Young B
Huygen C
None of these D

Question # 14

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

Dispersion A
Interference B
Reflection C
Refraction D

Question # 15

The terms phase difference and path difference are

Same A
Different B
Equal C
none of these D

Question # 16

A line which represents the direction of travel of a wave is known as

Spherical wavefront A
Locus B
Ray C
Either B or C D

Question # 17

Electromagnetic waves transport

Energy only A
Momentum only B
Both A and B C
None is correct D

Question # 18

When the source of light is at very large distance, the shape of wavefront is

Spherical A
Cylindrical B
Plane C
None of these D

Question # 19

Wavelength of light, on the average, is given by

10^-14m A
10^-10m B
10^-6m C
10^-4m D

Question # 20

Light waves are

Mechanical waves A
Electromagnetic waves B
Any of above C
None of above D

Question # 21

Monochromatic light means wave of

Same frequency A
Same colour B
Same Wavelength C
All of them D

Question # 22

Light waves are

Transverse waves A
Longitudinal waves B
Compressional C
None of them wave D

Question # 23

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

Frequency A
Amplitude B
Wavelength C
None of these D

Question # 24

Speed of light in vacuum depends upon

Frequency A
Wavelength B
Amplitude C
None of these D

Question # 25

Laws of reflection and refraction can also be explained by

Particle nature of light A
Quantum nature of light B
Wave nature of light C
Complex nature of light D

Question # 26

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

Neon lamp A
Fluorescent tube B
Sodium lamp C
None of these D

Question # 27

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

Monochromatic A
Phase coherent B
Both of above C
None of above D

Question # 28

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

Greater than A
Equal to B
Smaller than C
None of these D

Question # 29

In case of destructive interference of two waves, the amplitude of the resultant wave will be __________ either of the waves.

Greater than A
Smaller than B
Equal to C
None of these D

Question # 30

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

Equal to A
Greater than B
Smaller than C
None of these D

Sr.#	Question	Answer
1	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
2	Huygen principle is used to determine	A. Speed of light B. Location of wavefront C. About polarized and unpolarized light D. None of them
3	In YDS experiment, fringe spacing means the distance between two consecutive _________ fringes	A. Bright B. Dark C. Any of A or B D. None of these
4	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
5	In case of point source of light, shape of wavefront is	A. Spherical B. Cylindrical C. Plane D. None of above
6	Huygen's principle states that	A. Light travels in straight line B. Light has dual nature C. Either of these D. None of these
7	Angle between ray of light and the corresponding wavefront is	A. 0⁰ B. 60⁰ C. 90⁰ D. 120⁰
8	The appearance of colours in the soap (or oil) film results from	A. Dispersion B. Interference C. Reflection D. Refraction
9	Frequency of red colour as compared to that of violet colour is	A. Equal B. Smaller C. Greater D. None of these
10	Light has	A. Wave nature B. Dual nature C. Particle nature D. None of them
11	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
12	Wavelength of red colour as compared to that of violet colour is	A. Smaller B. Longer C. Equal D. None of these
13	The wave nature of light was proposed by	A. Newton B. Thomas Young C. Huygen D. None of these
14	The appearance of colours in the soap (or oil) film results from	A. Dispersion B. Interference C. Reflection D. Refraction
15	The terms phase difference and path difference are	A. Same B. Different C. Equal D. none of these
16	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
17	Electromagnetic waves transport	A. Energy only B. Momentum only C. Both A and B D. None is correct
18	When the source of light is at very large distance, the shape of wavefront is	A. Spherical B. Cylindrical C. Plane D. None of these
19	Wavelength of light, on the average, is given by	A. 10^-14m B. 10^-10m C. 10^-6m D. 10^-4m
20	Light waves are	A. Mechanical waves B. Electromagnetic waves C. Any of above D. None of above
21	Monochromatic light means wave of	A. Same frequency B. Same colour C. Same Wavelength D. All of them
22	Light waves are	A. Transverse waves B. Longitudinal waves C. Compressional D. None of them wave
23	The property of light which does not change with the nature of the medium is	A. Frequency B. Amplitude C. Wavelength D. None of these
24	Speed of light in vacuum depends upon	A. Frequency B. Wavelength C. Amplitude D. None of these
25	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
26	Which one of the followings can act approximately as a source of monochromatic light	A. Neon lamp B. Fluorescent tube C. Sodium lamp D. None of these
27	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
28	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
29	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
30	The speed of the secondary wavelets as mentioned in Huygen's principle is ________ the speed of propagation of the wave itself	A. Equal to B. Greater than C. Smaller than D. None of these

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ECAT Pre General Science Physics Chapter 10 MCQ Test With Answer

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

ECAT Pre General Science Physics Chapter 10 Optical Instruments

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

Huygen principle is used to determine

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

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

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

Huygen's principle states that

Angle between ray of light and the corresponding wavefront is

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

Frequency of red colour as compared to that of violet colour is

Light has

Two sources are said to be coherent if they have

Wavelength of red colour as compared to that of violet colour is

The wave nature of light was proposed by

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

The terms phase difference and path difference are

A line which represents the direction of travel of a wave is known as

Electromagnetic waves transport

When the source of light is at very large distance, the shape of wavefront is

Wavelength of light, on the average, is given by

Light waves are

Monochromatic light means wave of

Light waves are

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

Speed of light in vacuum depends upon

Laws of reflection and refraction can also be explained by

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

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

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

In case of destructive interference of two waves, the amplitude of the resultant wave will be __________ either of the waves.

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

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