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

Question # 1

The terms phase difference and path difference are

Same A
Different B
Equal C
none of these D

Question # 2

Light waves are

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

Question # 3

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 # 4

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 # 5

Light has

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

Question # 6

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 # 7

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

Spherical A
Cylindrical B
Plane C
None of above D

Question # 8

Angle between ray of light and the corresponding wavefront is

0⁰ A
60⁰ B
90⁰ C
120⁰ D

Question # 9

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 # 10

The wave nature of light was proposed by

Newton A
Thomas Young B
Huygen C
None of these D

Question # 11

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

Dispersion A
Interference B
Reflection C
Refraction D

Question # 12

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 # 13

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 # 14

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 # 15

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

Dispersion A
Interference B
Reflection C
Refraction D

Question # 16

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

Smaller A
Longer B
Equal C
None of these D

Question # 17

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 # 18

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 # 19

Electromagnetic waves transport

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

Question # 20

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 # 21

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

Question # 22

Wavelength of light, on the average, is given by

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

Question # 23

Speed of light in vacuum depends upon

Frequency A
Wavelength B
Amplitude C
None of these D

Question # 24

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 # 25

Monochromatic light means wave of

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

Question # 26

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 # 27

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 # 28

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 # 29

Light waves are

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

Question # 30

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

Equal A
Smaller B
Greater C
None of these D

Sr.#	Question	Answer
1	The terms phase difference and path difference are	A. Same B. Different C. Equal D. none of these
2	Light waves are	A. Mechanical waves B. Electromagnetic waves C. Any of above D. None of above
3	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
4	Huygen principle is used to determine	A. Speed of light B. Location of wavefront C. About polarized and unpolarized light D. None of them
5	Light has	A. Wave nature B. Dual nature C. Particle nature D. None of them
6	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
7	In case of point source of light, shape of wavefront is	A. Spherical B. Cylindrical C. Plane D. None of above
8	Angle between ray of light and the corresponding wavefront is	A. 0⁰ B. 60⁰ C. 90⁰ D. 120⁰
9	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
10	The wave nature of light was proposed by	A. Newton B. Thomas Young C. Huygen D. None of these
11	The appearance of colours in the soap (or oil) film results from	A. Dispersion B. Interference C. Reflection D. Refraction
12	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
13	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
14	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
15	The appearance of colours in the soap (or oil) film results from	A. Dispersion B. Interference C. Reflection D. Refraction
16	Wavelength of red colour as compared to that of violet colour is	A. Smaller B. Longer C. Equal D. None of these
17	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
18	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
19	Electromagnetic waves transport	A. Energy only B. Momentum only C. Both A and B D. None is correct
20	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
21	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
22	Wavelength of light, on the average, is given by	A. 10^-14m B. 10^-10m C. 10^-6m D. 10^-4m
23	Speed of light in vacuum depends upon	A. Frequency B. Wavelength C. Amplitude D. None of these
24	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
25	Monochromatic light means wave of	A. Same frequency B. Same colour C. Same Wavelength D. All of them
26	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
27	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
28	Huygen's principle states that	A. Light travels in straight line B. Light has dual nature C. Either of these D. None of these
29	Light waves are	A. Transverse waves B. Longitudinal waves C. Compressional D. None of them wave
30	Frequency of red colour as compared to that of violet colour is	A. Equal B. Smaller C. Greater 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

The terms phase difference and path difference are

Light waves are

Laws of reflection and refraction can also be explained by

Huygen principle is used to determine

Light has

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

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

Angle between ray of light and the corresponding wavefront is

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

The wave nature of light was proposed by

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

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

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

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

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

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

Two sources are said to be coherent if they have

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

Electromagnetic waves transport

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

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

Wavelength of light, on the average, is given by

Speed of light in vacuum depends upon

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

Monochromatic light means wave of

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

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

Huygen's principle states that

Light waves are

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

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