37 + Mcqs in Polarization Page 1 McqOptions

1.	Solids do not have which type of polarisation?
A.	Ionic
B.	Orientational
C.	Interfacial
D.	Electronic
Answer» D. Electronic

Discussion

2.	What does the following graph show?
A.	Linearly Polarized Light
B.	Unpolarized Light
C.	Partially Polarized Light
D.	Circular Polarized Light
Answer» B. Unpolarized Light

Discussion

3.	A plate which induces the desired amount of phase difference between two rays is known as ___________
A.	Polaroid
B.	Phasor plates
C.	Retardation Plates
D.	Quartz plates
Answer» D. Quartz plates

Discussion

4.	Unpolarized light is incident on a plane glass surface. What should be the angle of incidence such that the reflect and refracted rays are perpendicular to each other?
A.	90°
B.	45°
C.	57°
D.	60°
Answer» D. 60°

Discussion

5.	A tube of length 20cm containing a 10% sugar solution rotates the plane of polarization by 13.2°. What is the specific rotation of sugar solution?
A.	66°
B.	55
C.	44
D.	33
Answer» B. 55

Discussion

6.	What should be the thickness of quarter-wave plate for a light of wavelength 5890 Å if µe = 1.553 and µo = 1.544?
A.	1.33 X 10-3 cm
B.	1.43 X 10-3 cm
C.	1.53 X 10-3 cm
D.	1.63 X 10-3 cm
Answer» E.

Discussion

7.	An electromagnetic beam has an intensity 28 W/m2 and is linearly polarized vertically. What is the intensity of the transmitted beam, if the angle of incidence on the polaroid is 45o with the vertical?
A.	10 Wm-1
B.	12 Wm-1
C.	14 Wm-1
D.	16 Wm-1
Answer» D. 16 Wm-1

Discussion

8.	The velocity of light in water is 2.2 X 108 m/s. What is the polarizing angle of incidence?
A.	47.23
B.	51.02
C.	53.74
D.	65.36
Answer» D. 65.36

Discussion

9.	If the phase difference between two rays is π/2 and the angle of incidence is not equal to π/4, the emergent light is __________
A.	Linearly Polarized
B.	Elliptically Polarized
C.	Circularly Polarized
D.	Non-Polarized
Answer» C. Circularly Polarized

Discussion

10.	Which of the following is a uniaxial crystal?
A.	Borax
B.	Mica
C.	Quartz
D.	Selenite
Answer» D. Selenite

Discussion

11.	Sound waves can be polarized.
A.	True
B.	False
Answer» C.

Discussion

12.	What should be the phase difference between the two plane-polarized waves, vibrating at right angles to each other, to produce circularly polarized light?
A.	π/6
B.	π/2
C.	π/4
D.	π/3
Answer» C. π/4

Discussion

13.	A window which can transmit all the incident light without any reflection is called ___________
A.	Polarized Window
B.	Malus Window
C.	Brewster Window
D.	Non-reflecting window
Answer» D. Non-reflecting window

Discussion

14.	When two components are equally excited at the fiber input, then for polarization maintaining fibers δΓg should be around ___________
A.	1.5ns/km
B.	1 ns/km
C.	1.2ns/km
D.	2ns/km
Answer» C. 1.2ns/km

Discussion

15.	A polarization maintaining fiber operates at a wavelength 1.2μm and have a modal birefringence of 1.8*10-3. Calculate the period of perturbation.
A.	0.7 seconds
B.	0.6 seconds
C.	0.23 seconds
D.	0.5 seconds
Answer» C. 0.23 seconds

Discussion

16.	Beat length of a single mode optical fiber is 0.6cm. Calculate the difference between propagation constants for the orthogonal modes.
A.	69.8
B.	99.86
C.	73.2
D.	104.66
Answer» E.

Discussion

17.	The beat length in a single mode optical fiber is 8 cm when light from a laser with a peak wavelength 0.6μm is launched into it. Estimate the modal birefringence.
A.	1×10-5
B.	3.5×10-5
C.	2×10-5
D.	4×10-5
Answer» B. 3.5×10-5

Discussion

18.	An optical fiber behaves as a birefringence medium due to differences in ___________
A.	Effective R-I and core geometry
B.	Core-cladding symmetry
C.	Transmission/propagation time of waves
D.	Refractive indices of glass and silica
Answer» B. Core-cladding symmetry

Discussion

19.	The optical source used for detection of optical signal is ____________
A.	IR sensors
B.	Photodiodes
C.	Zener diodes
D.	Transistors
Answer» C. Zener diodes

Discussion

20.	For many applications that involve optical fiber transmission, an intensity modulation optical source is not required.
A.	True
B.	False
Answer» C.

Discussion

21.	IN_THE_GIVEN_TYPES_OF_POLARISATION,_WHICH_TYPE_EXISTS_IN_THE_SEMICONDUCTOR??$
A.	Electronic
B.	Ionic
C.	Orientational
D.	Interfacial or space charge
Answer» E.

Discussion

22.	Solids_do_not_have_which_type_of_polarisation?$
A.	Ionic
B.	Orientational
C.	Interfacial
D.	Electronic
Answer» D. Electronic

Discussion

23.	The total polarisation of a material is th?
A.	Product of all types of polarisation
B.	Sum of all types of polarisation
C.	Orientation directions of the dipoles
D.	Total dipole moments in the material
Answer» C. Orientation directions of the dipoles

Discussion

24.	Polarization modal noise can _________ the performance of communication system?
A.	Degrade
B.	Improve
C.	Reduce
D.	Attenuate
Answer» B. Improve

Discussion

25.	In isotropic materials, which of the following quantities will be independent of the direction?
A.	Permittivity
B.	Permeability
C.	Polarisation
D.	Polarizability
Answer» B. Permeability

Discussion

26.	When two components are equally excited at the fiber input, then for polarization maintaining fibers ‚âà√≠¬¨‚Ä¢‚âà√≠‚àö¬®gshould be around$
A.	1.5ns/km
B.	1 ns/km
C.	1.2ns/km
D.	2ns/km
Answer» C. 1.2ns/km

Discussion

27.	Calculate the polarisation vector in air when the susceptibility is 5 and electric field is 12 units.
A.	3
B.	2
C.	60
D.	2.4
Answer» D. 2.4

Discussion

28.	A polarization maintaining fiber operates at a wavelength 1.2‚âà√≠¬¨‚à´m and have a modal birefringence of 1.8*10-3. Calculate the period of perturbation.$
A.	0.7 seconds
B.	0.6 seconds
C.	0.23 seconds
D.	0.5 seconds
Answer» C. 0.23 seconds

Discussion

29.	Identify which type of polarisation depends on temperature.
A.	Electronic
B.	Ionic
C.	Orientational
D.	Interfacial
Answer» D. Interfacial

Discussion

30.	Beat length of a single mode optical fiber is 0.6cm. Calculate the difference between propagation constants for the orthogonal modes
A.	69.8
B.	99.86
C.	73.2
D.	104.66
Answer» E.

Discussion

31.	Calculate the energy stored per unit volume in a dielectric medium due to polarisation when P = 9 units and E = 8 units.
A.	1.77
B.	2.25
C.	36
D.	144
Answer» D. 144

Discussion

32.	The beat length in a single mode optical fiber is 8 cm, when light from a laser with a peak wavelength 0.6‚âà√≠¬¨‚à´m is launched into it. Estimate the modal birefringence.$
A.	1‚Äö√†√∂‚àö‚â•10<sup>-5</sup>
B.	3.5‚Äö√†√∂‚àö‚â•10<sup>-5</sup>
C.	2‚Äö√†√∂‚àö‚â•10<sup>-5</sup>
D.	4‚Äö√†√∂‚àö‚â•10<sup>-5</sup>
Answer» B. 3.5‚Äö√†√∂‚àö‚â•10<sup>-5</sup>

Discussion

33.	Polarizability is defined as the
A.	Product of dipole moment and electric field
B.	Ratio of dipole moment to electric field
C.	Ratio of electric field to dipole moment
D.	Product of dielectric constant and dipole moment
Answer» C. Ratio of electric field to dipole moment

Discussion

34.	An optical fiber behaves as a birefringence medium due to differences in
A.	Effective R-I and core geometry
B.	Core-cladding symmetry
C.	Transmission/propagation time of waves
D.	Refractive indices of glass and silica
Answer» B. Core-cladding symmetry

Discussion

35.	Calculate the polarisation vector of the material which has 100 dipoles per unit volume in a volume of 2 units.
A.	200
B.	50
C.	400
D.	0.02
Answer» B. 50

Discussion

36.	The optical source used for detection of optical signal is
A.	IR sensors
B.	Photodiodes
C.	Zener diodes
D.	Transistors
Answer» C. Zener diodes

Discussion

37.	For many applications which involve optical fiber transmission, an intensity modulation optical source is not required. State whether the given statement is true or false.
A.	True
B.	False
Answer» C.

Discussion

Explore topic-wise MCQs in Optical Communication.

Solids do not have which type of polarisation?

What does the following graph show?

A plate which induces the desired amount of phase difference between two rays is known as ___________

Unpolarized light is incident on a plane glass surface. What should be the angle of incidence such that the reflect and refracted rays are perpendicular to each other?

A tube of length 20cm containing a 10% sugar solution rotates the plane of polarization by 13.2°. What is the specific rotation of sugar solution?

What should be the thickness of quarter-wave plate for a light of wavelength 5890 Å if µe = 1.553 and µo = 1.544?

An electromagnetic beam has an intensity 28 W/m2 and is linearly polarized vertically. What is the intensity of the transmitted beam, if the angle of incidence on the polaroid is 45o with the vertical?

The velocity of light in water is 2.2 X 108 m/s. What is the polarizing angle of incidence?

If the phase difference between two rays is π/2 and the angle of incidence is not equal to π/4, the emergent light is __________

Which of the following is a uniaxial crystal?

Sound waves can be polarized.

What should be the phase difference between the two plane-polarized waves, vibrating at right angles to each other, to produce circularly polarized light?

A window which can transmit all the incident light without any reflection is called ___________

When two components are equally excited at the fiber input, then for polarization maintaining fibers δΓg should be around ___________

A polarization maintaining fiber operates at a wavelength 1.2μm and have a modal birefringence of 1.8*10-3. Calculate the period of perturbation.

Beat length of a single mode optical fiber is 0.6cm. Calculate the difference between propagation constants for the orthogonal modes.

The beat length in a single mode optical fiber is 8 cm when light from a laser with a peak wavelength 0.6μm is launched into it. Estimate the modal birefringence.

An optical fiber behaves as a birefringence medium due to differences in ___________

The optical source used for detection of optical signal is ____________

For many applications that involve optical fiber transmission, an intensity modulation optical source is not required.

IN_THE_GIVEN_TYPES_OF_POLARISATION,_WHICH_TYPE_EXISTS_IN_THE_SEMICONDUCTOR??$

Solids_do_not_have_which_type_of_polarisation?$

The total polarisation of a material is th?

Polarization modal noise can _________ the performance of communication system?

In isotropic materials, which of the following quantities will be independent of the direction?

When two components are equally excited at the fiber input, then for polarization maintaining fibers ‚âà√≠¬¨‚Ä¢‚âà√≠‚àö¬®gshould be around$

Calculate the polarisation vector in air when the susceptibility is 5 and electric field is 12 units.

A polarization maintaining fiber operates at a wavelength 1.2‚âà√≠¬¨‚à´m and have a modal birefringence of 1.8*10-3. Calculate the period of perturbation.$

Identify which type of polarisation depends on temperature.

Beat length of a single mode optical fiber is 0.6cm. Calculate the difference between propagation constants for the orthogonal modes

Calculate the energy stored per unit volume in a dielectric medium due to polarisation when P = 9 units and E = 8 units.

The beat length in a single mode optical fiber is 8 cm, when light from a laser with a peak wavelength 0.6‚âà√≠¬¨‚à´m is launched into it. Estimate the modal birefringence.$

Polarizability is defined as the

An optical fiber behaves as a birefringence medium due to differences in

Calculate the polarisation vector of the material which has 100 dipoles per unit volume in a volume of 2 units.

The optical source used for detection of optical signal is

For many applications which involve optical fiber transmission, an intensity modulation optical source is not required. State whether the given statement is true or false.