interference mcqs
TRANSCRIPT
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
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