NO Questions Option-A1 Wave nature of light evidenced by Photoelectric effect

2 Two sources are said to be coherent Same wavelength

3 Diffraction

4

5

6 Light waves are Longitudinal waves

7 Interference

8 2λ

9 Dark

10 Dark

11 Odd natural number

12 Extended source is needed in

13

14 Interfernce occours in

15 Newton's rings are

16 λ

17 Polarization

18 Same frequency

19

20 Increases

When a thin film of ol or soap bubble is illuminated with white light, multiple colours appears, This is due to

Condition for Destructive interfence pattern is

Path difference is even multiple of λ/2

Condition for Constructive interfence pattern is

Path difference is odd multiple of λ/2

Which of the following does not supports the wave nature of lightA phase difference of π between two interfacing beams is equivalent to path differenceIn reflected light the central fringe of Newtons Ring is In Transmitted light the central fringe of Newtons Ring is In Newtons ring, the diameter of bright ring is propotional to

Young's double slit experiemnt

In interference with two coherant sources, the fringe width varies

Directly with wavelength

Longitudinal waves only

Locus of points of equal thickness

In Newton's ring experiemnt, diameter of rings formed is praportional toOne of the following phenomena cannot be explained by wave theory of lightTo demonstrate the phenomena of interference, we require two sources of which emits radiation of Which of the following interference is produced by the division of wavefront

Fabry Perot Interferrometer

When a thin sheet of mica is introduced in the path of one of the interfacing beam, then the fringe width

21 Young's Experiement proved that Light consist of wav

22 Bright

23 Increases

24 Increases

25 Increases

26 White

27

28 λ

29 Air-Wedge fringes are always Circular

30 3π/2

31 Wavelength

32 For interference pattern

33 Broad source

34 Increases

35 Decreases

36 Wavelength of light

37

38

39 Interference

40 Same wavelength

In Fresnel's Biprism experiemt the central fringe is If Young's appratus is immersed in water, then the fringe width

In Newton's ring experiement, the distance between lens and the plate is increased, the order of the ring at a given point is

In Young's double slit experiement, the monochromatic source of yellow light is replaced by red light, then Frige width will be

An excessively thin film appears in reflected light

In Newtons ring experiment, if the planconvex lens is replaced by Biconvex lens then,

Width of fringes reduced to half of its origional value

In antireflection coating wavelength is in the order of

A path difference of 3λ/2 between two waves corresponds to the phase difference of

Which of the following does not changes the refraction

Width of dark and bright bands are equal

To observe colour in thin films, film must exposed to

Width of fringes for wedge shape film changes with the increase of wedge angle

In Newton's ring expt. The air film is repalced by water film, then the diameter of the ring

In Newton's ring expt. Which properties are measured

When Newton's ring is observed under white light, which of the following statement is true

Only first few coloured rings will be visible

Which of the following are coherant sources

A 60 W and A 100 W bulbs

The wave nature of light is manifested by the phenomena called asThe two sources are said to be coherent if the emitted wave exhibits

41 0

42 2:01

43 Path difference

44 λ/4

45 λ/4

46 Maxima and minima a

47 Interference pattern

48 Presence of colors

49 Constant

50 Width of fringes

51 Half

52 Maxima

53 6000Ǻ

54 Same intensity

55 Minimum

56 Different width

57 Different width

58 nλ

59 (2n-1)λ/2

60 (2m-1)π

61 (2m-1)π

The phase difference of wave at glass – air interface is

In the interference pattern of two waves, the intensities are 9:1, so the ratio of maximum to minimum intensities is

If a light wave travelling a distance‘t’ through a medium of refractive index ‘μ’ then the product ‘μt’ is associated with

In destructive interference pattern, the path difference is odd multiple of In constructive interference pattern, the path difference is even multiple of When t=0, the film is dark and thickness increases gradually, the results in appearance of If a film of large thickness is illuminated by a white light then it shows A very thick film is illuminated by a white light, the reflected light shows

For bright or dark fringes of any particular order, the path difference must be

The separation distance between two successive fringes (dark or bright) must be

If Plano-convex lens is replaced by Bi-convex lens, then the converging power of lens become

The width of fringes reduces to half atThe eyes are more sensitive to which wavelength of lightIn interference pattern, all maxima have In diffraction, the intensity of central maxima is In interference pattern, the fringes are equally spaced haveIn diffraction pattern, the fringes are not equally spaced haveFor constructive interference, the path difference is For destructive interference, the path difference is For constructive interference, the phase difference is For destructive interference, the phase difference is

62 Two

63 Velocity

64 No phase change

65 No phase change

66 Extended sources

67 ˂ 1

68 Interference

69 Increases

70 Increases

71 Fresnel

72 Plane

73 Plane

74 One

75 Interference

76

77 Fresnel

78 Fresnel

79 Fresnel

80 Fresnel

81 Spherical

82 Spherical

83 Fresnel

84 Particle

Interference is caused by superposition of ----- wavesWhich of the following changes in interference of light?

When light traveling in air gets reflected from water surface, there is -----

When light traveling in air gets transmitted in water, there is ----- Division of wavefront can be achieved withRefractive index of one medium with respect to another cannot be Formation of colors in light reflected from or transmitted through soap films is due to the phenomena of ---- lightIf the refractive index of the medium of a wedge shaped film increases, fringe width -----

In Newton's ring experiment, as we move away from center the fringe width----------

The diffraction is divided into two different categoriesIn Fraunhofer diffraction, the diffracted wavefront isIn Fresnel diffraction, the diffracted wavefront isFor first minimum, the order of spectrum is The bending property of light at the sharp edge of the obstacle is

In Fraunhofer diffraction at circular aperature, the radius of central disc is

Independent on diameter of aperature

Slit to screen distance is finite in ------ diffractionSlit to screen distance is infinite in ------ diffractionSource to slit distance is finite in --- diffractionSource to slit distance is Infinite in --- diffractionIn Fresnel diffraction, the wavefront incident on slit is ---In Fraunhofer diffraction, the wavefront incident on slit is ---Light eneters the geometrical shadow of slit in ---Diffraction of light manifest its --- nature

85 Fresnel

86 Fraunhofer

87 Fraunhofer

88 A line on diffraction grating is An opaque space

89 Come closer

90

91 0

92

93 Reflection

94 1 mm

95 Fringes becomes bri

There is path difference between the rays coming from a source before entering the slit in --

There is no path difference between the rays coming from a source before entering the slit in --

To observe the diffraction pattern lenses are required in

In Fraunhofer diffraction at a single slit, as slit width decreased , the adjecent minimaWhich of the following depends on the total number of lines on the grating

Intensity of principal maxima

Which orders of maxima cannot be absent in the diffraction pattern of any grating

Which of the following depends on grating element

Position of principal maxima

Scattering of light by very small particles can be considered to be a special case of Diffraction appears if the size of obstacle in path of rays is the order of In a single slit experiments, if the slit width is reduced

Option-B Option-C Option-D Correct OptionInterference Black body radiation B

Same amplitude All of the above D

Polarization Interference D

B

B

Transverse waves Both A and B C

Polarization Compton effect Diffraction C

λ λ/2 C

Non-uniform Bright A

Non-uniform Bright C

Natural number Even natural number D

C

A

All of the above D

Neither A or B A

λ2 Square root of λ C

Diffraction Photoelectric effect Interference C

C

Newton's ring D

Decreases Remains Unchanged C

Nuclear emission

Constant phase diffeence

Total Internal Reflection

Path difference is odd multiple of λ/2

Path difference is Integral multiple of λ/2

None of the above

Path difference is even multiple of λ/2

Path difference is Integral multiple of λ/2

None of the above

None of the above

None of the above

None of the aboveNone of the aboveSquare root of natural number

Biprism Experiment

Newton's ring experiment

None of the above

Inversly with wavelength

Directly with separation between slits

Inversly with distance between slits and screen

Transverse wave only

Electromagnetic wave only

Locus of points of equal Inclination

Locus of points of equal thickness and Inclination

Inversly praportional to square root of λ

Nearly the same frequency

Same frequency and have a definite phase relationship

Different wavelength

Michelson's Interferrometer

Fresnel's Biprism

None of the above

A

Dark A

Decreases Remains Unchanged B

Decreases Remains Unchanged C

Decreases Unchanged A

Black Red Yellow B

None of these A

λ/2 λ/4 2λ C

Spherical Cylindrical Straight D

π/3 3π 2π/3 C

Frequency Velocity Intensity B

None of these A

Point source Either A or B A

Decreases Remains same Difficult to say B

Increases Remains same A

All of the above D

A

A

Diffraction Reflection Refraction A

same amplitude All of above. D

Light consist of particles

Light neither particle nor wave

Light is both particle and a wave

First dark then bright

First bright then darkNone of the above

Fringe pattern disappears

Fringe pattern disappears

Width of fringes increases to double of its origional value

Width of fringes remains same

Width of dark and bright bands are Unequal

Width of bright bands are lesser than dark band

None of the above

None of the above

Thickness of the film

Refractive index of liquid

All clooured rings will be visible

All rings will disappears

None of the above

Two bulbs each of 60 Watt

Two halves of a 60 Watt bulbs

Virtual sources obtained by a Biprism

Constant phase difference

π/2 π/4 π A

9:01 3:01 4:01 D

Phase difference Optical path C

λ/2 λ 2λ B

λ/2 λ 2λ B

Maxima and minima Maxima Minima A

No interference patDiffraction pattern B

No colors No any pattern B

Increases Decreases A

Band width Fringe width C

Doubled Multiple order B

Minima Central dark spot C

6500 Ǻ 5500 Ǻ 5890 Ǻ C

Lower intensity Higher intensity A

Maximum No intensity B

Same width Average width B

Same width Average width A

(2n-1)λ/2 (2n-1)π 2nπ A

nλ (2n-1)π 2nπ A

2mπ mλ (2m-1)λ/2 B

2mπ mλ (2m-1)λ/2 A

None of the above

None of the aboveNone of the above

None of the above

None of the above

None of the above

Central bright spot

None of the above None of the above None of the above None of the above

Three Four Any Number of D

Frequency Wavelength D

Phase change of π/4 D

Phase change of π/4 A

Point sources Both A and B Neither A or B C

> 1 1.5 D

Diffraction Polarization Scattering A

Decreases Remains same B

Decreases Remains same B

Fraunhofer C

Spherical Cylindrical A

Spherical C

Two Three A

Dispersion Diffraction pattern Polarization C

None of these C

Fraunhofer Both A and B A

Fraunhofer Both A and B B

Fraunhofer Both A and B A

Fraunhofer Both A and B B

Cylindrical A or B Plane C

Cylindrical A or B Plane D

Fraunhofer Both A and B C

Wave Dual nature B

None of the above

Phase change of π/2

Phase change of π

Phase change of π/2

Phase change of π

None of the above

First increases and then decreases

First increases and then decreases

Fresnel and Fraunhofer

None of the above None of the above

Either spherical or cylindrical

None of the above None of the above

Large as the diameter of aperature is large

Small as the diameter of aperature is large

None of the aboveNone of the aboveNone of the aboveNone of the above

None of the aboveNone of the above

Fraunhofer Both A and B A

Fresnel Both A and B A

Fresnel Both A and B A

A slit C

Move Apart B

A

1 2 0 and 1 D

Position of minima Maximum order All above D

Refraction Interefernce Diffraction D

10-4 mm 0.1 mm 1 cm B

B

None of the above

None of the above

None of the above

A slit and an opaque space

None of the above

Remains at fixed position

Increases initailly and then decraeses

Intensity of minima

Position of principal maxima

Position of minima

Fringes become narrower

Fringes become wider

Colour of fringes change

TopicInterference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Interference

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction

Diffraction