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1 On rotating the analyzer if the intensity of light rays coming out of it varies from maximum to zero then the incident beam of light is

A un-polarized B plane polarized C partially polarized D polarized

✅ Correct Answer: 3

2 Which one of the following cannot be polarized

A sound waves B X-rays C microwaves D radio waves

✅ Correct Answer: 1

3 Light waves are

A longitudinal B transverse C like sound waves D like pressure waves

✅ Correct Answer: 2

4 The light which cannot be completely plane polarized by reflection is

A red color B green color C white color D blue color

✅ Correct Answer: 3

5 Brewsters law in polarization of light by reflection states that

A ï¿½ = 1/tan ip B tan ip = ï¿½ C tan r = ï¿½ D tan-1(ip) = ï¿½

✅ Correct Answer: 2

6 If the refraction index of a medium like glass is ï¿½ the polarizing angle ip is given by

A ip = sin-1 (ï¿½) B ip = cos-1 (ï¿½) C ip = tan-1 (ï¿½) D ip = tan ï¿½

✅ Correct Answer: 3

7 The property that distinguishes the transverse waves from the longitudinal waves is

A reflection B dispersion C polarization D interference

✅ Correct Answer: 3

8 Polarization of light by reflection on the surface of glass was discovered by

A Bartholinus B Malus C Brewster D Fresnel

✅ Correct Answer: 2

9 From Brewsters law we find that polarizing angle depends on

A the plane of vibration of the beam B the plane of polarization of the beam C the refractive index of the medium D the thickness of the medium

✅ Correct Answer: 3

10 On rotating the analyzer if the rays coming out of it has same intensity then the incident beam is

A plane polarized B partially polarized C un-polarized D polarized

✅ Correct Answer: 3

11 On rotating the analyzer if the rays coming out of it has the intensity varies from maximum to minimum then the incident light is

A un-polarized B plane polarized C partially polarized D polarized

✅ Correct Answer: 3

12 Double diffraction phenomenon was first observed by

A Newton B Fresnel C Bartholinus D Brewster

✅ Correct Answer: 3

13 A device used to get plane polarized light is

A grating B spectrometer C polarizer D pyroheliometer

✅ Correct Answer: 3

14 Plane of polarization is the plane

A containing the optic axis B in which vibration of particles takes place C perpendicular to the plane of vibration containing the direction of propagation of polarized light D parallel to the plane of vibration

✅ Correct Answer: 3

15 Along the direction of the optic axis of a calcite crystal the ordinary rays travel with

A the same velocity as that of the extraordinary rays B half the velocity of the extraordinary rays C two times the velocity of the extraordinary rays D ?2 times the velocity of the extraordinary rays

✅ Correct Answer: 1

16 The angle of inclination of pile of plates to the axis of the tube is

A 725ï¿½ B 325ï¿½ C 575ï¿½ D 90ï¿½

✅ Correct Answer: 2

17 The phenomenon used in the construction of pie of plates is

A interference of light B diffraction of light C refraction of light D polarization by reflection

✅ Correct Answer: 4

18 A mixture of plane polarized light and un-polarized light is known as

A plane polarized light B partially polarized light C un-polarized light D polarized light

✅ Correct Answer: 2

19 In polarization the plane of vibration is the plane

A parallel to the vibration of particles B containing the optic axis in which vibrations occur C perpendicular to the optic axis D containing the direction of propagation of polarized light

✅ Correct Answer: 2

20 Sound waves cannot be polarized while light waves can be polarized because

A sound travels slower than light B light waves are transverse while sound waves are longitudinal C light waves are longitudinal while sound waves are transverse D sound waves have longer wavelength than waves

✅ Correct Answer: 2

21 Double diffraction is exhibited by

A glass B gas C calcite D liquid

✅ Correct Answer: 3

22 The phenomenon which proves that light waves are transverse wave is

A diffraction B refraction C polarization D total internal reflection

✅ Correct Answer: 3

23 For one incident ray there will be generally two refracted rays in double refraction in calcite crystals Which of the following statement is correct?

A Out of two refracted rays one is polarized and the other is not B Both are polarize in the same plane of polarization C Both are polarized but their planes of polarization are at right angles to each other D Neither is polarized

✅ Correct Answer: 3

24 The polarizing angle for glass is about 25

A 360ï¿½ B 420ï¿½ C 575ï¿½ D 900ï¿½

✅ Correct Answer: 3

25 If the polarizing angle for glass plate is 60ï¿½ then the refractive index of the glass plate is 05

A 05 B ?3/2 C ?3 D 1/?2

✅ Correct Answer: 3

26 The velocity of the extraordinary ray and that of the ordinary ray in calcite crystal are

A same in all directions B different in all directions C same in only one direction namely along the optic axis D zero in one direction and more than zero in perpendicular direction

✅ Correct Answer: 3

27 When light is incident on a plane surface at the polarizing angle the angle between the reflected beam and the refracted beam

A 45ï¿½ B 90ï¿½ C 575ï¿½ D 325ï¿½

✅ Correct Answer: 2

28 Light is incident on a surface at a polarizing angle 57ï¿½ Then the reflected beam is at

A 57ï¿½ B 33ï¿½ C 90ï¿½ D 60ï¿½

✅ Correct Answer: 1

29 According to Brewsters law the tangent of polarizing angle is

A equal to the refractive index of the medium B directly proportional to the square root of the refractive index of the medium C same in only one direction namely along the optic axis D directly proportional to the square of the refractive index of the medium

✅ Correct Answer: 1

30 Which one of the following is used to give a three dimensional view in stereoscopic motion picture

A Polaroid B grating C prism D glass slab

✅ Correct Answer: 1

31 An example of biaxial crystal is

A Quartz B Mica C Ice D Calcite

✅ Correct Answer: 2

32 Polarized light when used for viewing Aerial Pictures gives

A a brighter image B more contrast to the image C a better perception of depth D different colors to the image

✅ Correct Answer: 3

33 H-polaroids and K-polaroids are prepared by using

A Nicol prisms B iodosulphate of quinine C a thin film of polyvinyl alcohol D calcite crystal

✅ Correct Answer: 3

34 The optical component used to produce stereoscopic motion picture is

A Polaroid B Diffraction gratings C Beam splitters D Interferometers

✅ Correct Answer: 1

35 Which one of the following is an example biaxial crystal

A Tourmaline B Quartz C Calcite D Mica

✅ Correct Answer: 4

36 Tourmaline crystal is

A an uniaxial crystal B a biaxial crystal C an opaque crystal D a single refracting crystal

✅ Correct Answer: 1

37 The planes of vibrations of the extraordinary and the ordinary rays are

A parallel to each other B perpendicular to each other C making an angle of 575ï¿½ with the axis D making an angle of 325ï¿½ with the axis

✅ Correct Answer: 2

38 Nicol prism is used to produce

A diffraction of light B polarized light C spectrum D refraction of light

✅ Correct Answer: 2

39 Polaroid are used in aero planes to

A reduce pressure B increase incoming radiations C reduce incoming radiations D increase pressure

✅ Correct Answer: 3

40 In Nicol prism the refractive indices for the ordinary ray and the extraordinary ray are

A 149 and 166 respectively B 166 and 149 respectively C 155 and 166 respectively D 155 for both

✅ Correct Answer: 2

41 In a doubly refracting crystal along the optic axis the ordinary ray and the extraordinary ray

A travel with the same velocity B have different velocities C travel slowly D travel faster

✅ Correct Answer: 1

42 In Nicol prism the phenomenon that takes place at the layer of Canada balsam isextraordinary and refraction

A reflection only B total internal reflection for ordinary and refraction for extraordinary rays C total internal reflection for D for ordinary rays refraction only

✅ Correct Answer: 2

43 The production of stereoscopic motion picture uses the principle of

A interference B diffraction C polarization D reflection

✅ Correct Answer: 3

44 A device using micro crystal of herapathite (iodosulphate of quinine) is used for the production of

A diffraction B X-rays C interference pattern D polarization of light

✅ Correct Answer: 4

45 H- Polaroid is a thin film of nitrocellulose

A herpatite impregnated with B quinine iodosulphate impregnated with iodine C polyvinyl chloride D polyvinyl alhohol

✅ Correct Answer: 4

46 Example of uniaxial crystal is

A mica B quartz C topaz D selenite

✅ Correct Answer: 2

47 Nicol prism is made up of

A Nicol crystal B calcite C mica D quartz

✅ Correct Answer: 2

48 The phenomenon that takes place in a Nicol prism is

A dispersion B scattering C deviation D double refraction

✅ Correct Answer: 4

49 Example of biaxial crystal is

A calcite B quartz C ice D topaz

✅ Correct Answer: 4

50 The light emerging from a Nicol prism

A has vibration in all directions B has vibration in one direction only C has no vibration at all D has vibrations in two mutually perpendicular directions

✅ Correct Answer: 2

51 Which one of the following may be used both as a polarizer and a analyzer

A Nicol prism B liquid prism C rock crystal D crystal of diamond

✅ Correct Answer: 1

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