Diffraction is special type of __________. A. Reflection B. Refraction C. Interference D. Polarization

Diffraction is special type of __________.
A. Reflection
B. Refraction
C. Interference
D. Polarization
by

1 Answer

Answer :

B. Refraction
by

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Which of the following phenomenon produces colors in soap bubble? (a) Interference (b) Diffraction (c) Polarization (d) Dispersion

Description : Which of the following phenomenon produces colors in soap bubble? (a) Interference (b) Diffraction (c) Polarization (d) Dispersion

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On a rainy day, small oil films on water show brilliant colors'. This is due to A. dispersion B. interference C. diffraction D. Polarization 49.The critical angle for a beam of light passing from water into air is 48.8 °. This means that all light rays with an angle of incidence greater than this angle will be A. absorbed B. totally reflected C. Partially reflected and partially transmitted D. Totally transmitted

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The principle on which fiber optics is based is A. refraction C. polarization B. Dispersion. D. Total internal reflection

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The information of brilliant colors in a thin soap film is a consequence of the phenomena of - (1) Polarization and interference (2) Diffraction and dispersion (3) Multiple refraction and dispersion (4) Multiple reflection and interference

Description : The information of brilliant colors in a thin soap film is a consequence of the phenomena of - (1) Polarization and interference (2) Diffraction and dispersion (3) Multiple refraction and dispersion (4) Multiple reflection and interference

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The information of brilliant colors in a thin soap film is a consequence of the phenomena of - (1) Polarization and interference (2) Diffraction and dispersion (3) Multiple refraction and dispersion (4) Multiple reflection and interference

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Last Answer : (4) Multiple reflection and interference Explanation: Light waves reflected by the upper and lower boundaries of a thin film interfere with one another, either enhancing or reducing the reflected light.

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Newton’s light illustrate the phenomenon of (a) Interference (b) Diffraction (c) Dispersion (d) Polarisation

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Which of the following phenomenon helps to conclude that light is a transverse wave? (1) interference (2) diffraction (3) polarization (4) refraction

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A thin oil film on a water surface appears coloured because of – (1) reflection (2) interference (3) diffraction (4) polarization

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Last Answer : (2) interference Explanation: A thin oil film on a water surface appears coloured because of thin-film interference which involves the interference of light waves reflecting off the top surface of a film with the waves reflecting from the bottom surface.

A soap bubble shows colours when illuminated with white light. This is due to – (1) Diffraction (2) Polarization (3) Interference (4) Reflection

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Last Answer : (3) Interference Explanation: The iridescent colours of soap bubbles are caused by interfering of (internally and externally) reflected light waves and are determined by the thickness of the film. This phenomenon ... are the same as the phenomenon causing the colours in an oil slick on a wet road.

The wavelength of light has no role in a. Diffraction b. Interference c. Polarization d. Reflection

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Last Answer : c. Polarization

The wavelength of light has no role in ∙ a. Diffraction ∙ b. Interference ∙ c. Polarization ∙ d. Reflection

Description : The wavelength of light has no role in ∙ a. Diffraction ∙ b. Interference ∙ c. Polarization ∙ d. Reflection

Last Answer : c. Polarization

A thin oil film on a water surface appears coloured because of (1) reflection (2) interference (3) diffraction (4) polarization

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A pond of water appears less deep due to – (1) Reflection (2) Diffraction (3) Refraction (4) Polarization

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Longitudinal waves do not exhibit a. Polarization b. Refraction c. Reflection d. Diffraction

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Longitudinal waves do not exhibit ∙ a. Polarization ∙ b. Refraction ∙ c. Reflection ∙ d. Diffraction

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An index of refraction less than one for a medium would imply A. That the speed of light in the medium is the same as the speed of light in vacuum B. That the speed of light in the medium is greater than the speed of light in vacuum C. Refraction is not possible D. Reflection is not possible

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Last Answer : B. That the speed of light in the medium is greater than the speed of light in vacuum

Rainbow is due to A. absorption of sunlight in minute water droplets B. diffusion of sunlight through water droplets C. ionization of water deposits D. refraction and reflection of sunlight by water droplets

Description : Rainbow is due to A. absorption of sunlight in minute water droplets B. diffusion of sunlight through water droplets C. ionization of water deposits D. refraction and reflection of sunlight by water droplets

Last Answer : D. refraction and reflection of sunlight by water droplets

Which phenomenon is responsible for the echo of sound wave? (1) Reflection (2) Refraction (3) Interference (4) Polarization

Description : Which phenomenon is responsible for the echo of sound wave? (1) Reflection (2) Refraction (3) Interference (4) Polarization

Last Answer : (1) Reflection Explanation: Reflection of sound waves off of surfaces lead to one of two phenomena - an echo or a reverberation. The echo is produced due to hitting of the sound waves with the ... reflected sound wave reaches the ear more than 0.1 seconds after the original sound wave was heard.

Twinkling of stars is caused by ? A. Reflection of light B. Polarization of light C. refraction of light (Answer) D. Interference of light E. None of these

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Fresnel’s type diffraction is observed when __________. A. Only screen is placed at finite distance B. Only source is placed at finite distance C. Both source and screen are at finite distance D. Neither source nor screen is at finite distance

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Last Answer : C. Both source and screen are at finite distance

here are two types of diffraction Fresnel and __________. A. Michelson B. De Broglie C. Fraunhofer D. Huygens

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as the order increases, the width of a dark band in diffraction Patterns __________. A. Increases B. Decreases C. Does not change D. becomes infinity

Description : as the order increases, the width of a dark band in diffraction Patterns __________. A. Increases B. Decreases C. Does not change D. becomes infinity

Last Answer : Increases

X-ray diffraction can be observed by using __________. A. Diffraction Grating B. Rock salt crystal C. Convex lens D. Michelson’s interferometer

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.The grating used to observe, diffraction of visible light can have approximately __________. A.300 lines per cm B.3000 lines per cm, C. 15000 lines per cm D. 30 lines per cm

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Last Answer : C. 15000 lines per cm

The diffraction observed by diffraction grating can also be Termed as __________. A. Single slit diffraction B. double slit Diffraction C. multiple Slit Diffraction D. Fresnel’s Diffraction

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Last Answer : A. Single slit diffraction

In Fraunhofer diffraction wave front used is __________. A. Spherical B. Circular C. Plane D. Conical 71.In diffraction pattern of monochromatic light the bright bands formed are __________. A. of uniform intensity B. of non-uniform intensity C. of uniform width D. is of different colors

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Last Answer : A. of uniform intensity

Fraunhofer diffraction is observed when __________. A. Only screen is placed at finite distance B. source is placed at finite distance C. neither source nor screen is at finite distance D. None of these

Description : Fraunhofer diffraction is observed when __________. A. Only screen is placed at finite distance B. source is placed at finite distance C. neither source nor screen is at finite distance D. None of these

Last Answer : D. None of these

When Newton’s rings interference pattern is viewed from above by means of reflected light, the central spot is __________. A. Dark B. Multi colored C. Bright D. None of these

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__________ of the following phenomenon cannot be explained on the particle nature of light. A. Photo Electric Effect B. Compton’s Effect C. Pair Production D. Interference

Description : __________ of the following phenomenon cannot be explained on the particle nature of light. A. Photo Electric Effect B. Compton’s Effect C. Pair Production D. Interference

Last Answer : A. Photo Electric Effect

In Michelson interferometer semi silvered mirror is used To obtain __________. A. Thin film interference B. Phase coherence C. mono chromatic light D. colored fringe

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The characteristic that distinguishes a laser beam from an ordinary light beam is: A. The greater frequency of the laser beam B. The coherence of the laser beam C. The color of the laser beam D. The greater polarization of the laser beam

Description : The characteristic that distinguishes a laser beam from an ordinary light beam is: A. The greater frequency of the laser beam B. The coherence of the laser beam C. The color of the laser beam D. The greater polarization of the laser beam

Last Answer : B. The coherence of the laser beam

Diffraction due to circular aperture If a light passes through a small pinhole, and incident on a screen. What will be observed on the screen? A.A sharp bright point of the width equal to width the pinhole B. A bright point of the width equal to width the pinhole but of less intensity C. A bright ring at the centre surrounded by alternate dark and bright rings D. A diffused bright point

Description : Diffraction due to circular aperture If a light passes through a small pinhole, and incident on a screen. What will be observed on the screen? A.A sharp bright point of the width equal to ... A bright ring at the centre surrounded by alternate dark and bright rings D. A diffused bright point

Last Answer : C. A bright ring at the centre surrounded by alternate dark and bright rings

What is the effect of increasing the number of slits on the intensity of Central maxima of diffraction pattern of a diffraction grating? A. Intensity of central maxima will decrease B. Intensity of central maxima will increase C. There will not be any effect D. Diffraction pattern will disappear

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Last Answer : B. Intensity of central maxima will increase

Fraunhofer diffraction at a Plane Grating What is the meaning of grating element for a diffraction grating? A It is the width of a single slit B. It is the width of the opaque space C. It is the distance between two slits D. It is the width of diffraction grating

Description : Fraunhofer diffraction at a Plane Grating What is the meaning of grating element for a diffraction grating? A It is the width of a single slit B. It is the width of the opaque space C. It is the distance between two slits D. It is the width of diffraction grating

Last Answer : C. It is the distance between two slits

How the intensity of secondary maxima varies in case of Fraunhofer diffraction pattern for single slit? A. Intensity of secondary maxima decreases on either sides B. Intensity of secondary maxima remains constant on either side C. Intensity increases and decreases alternately D. Intensity of secondary maxima increases on either sides

Description : How the intensity of secondary maxima varies in case of Fraunhofer diffraction pattern for single slit? A. Intensity of secondary maxima decreases on either sides B. Intensity of ... C. Intensity increases and decreases alternately D. Intensity of secondary maxima increases on either sides

Last Answer : A. Intensity of secondary maxima decreases on either sides

The condition for minima in Fraunhofer diffraction for single slit is asinθ = mλWhat is ‘θ’? A. Angle of incidence of incident rays at the slit B. Angle at which diffracted rays strikes the screen C. Angle between slit and screen D. Angle of diffraction at which rays are diffracted at slit

Description : The condition for minima in Fraunhofer diffraction for single slit is asinθ = mλWhat is ‘θ’? A. Angle of incidence of incident rays at the slit B. Angle at which diffracted rays strikes the screen C. Angle between slit and screen D. Angle of diffraction at which rays are diffracted at slit

Last Answer : D. Angle of diffraction at which rays are diffracted at slit

In Fraunhofer diffraction pattern for single slit, a central maximum is obtained when angle of diffraction q is equal to zero. What it actually indicates? A. All the diffracted rays are parallel and focused by slit at a single point on screen B. All the diffracted rays are perpendicular and focused by slit at a single point on screen C. The rays are diffracted by the slit in all the directions D. The rays are reflected by the slit

Description : In Fraunhofer diffraction pattern for single slit, a central maximum is obtained when angle of diffraction q is equal to zero. What it actually indicates? A. All the diffracted rays are parallel and focused ... are diffracted by the slit in all the directions D. The rays are reflected by the slit

Last Answer : A. All the diffracted rays are parallel and focused by slit at a single point on screen

Which of the following condition is essential for observing Fraunhofer diffraction? A. Source must be close to slit and screen should be at infinite distance B. Both source and screen must be close to slit C. Source must be at infinity and screen should be close to the slit D. Both source and screen must be at infinity

Description : Which of the following condition is essential for observing Fraunhofer diffraction? A. Source must be close to slit and screen should be at infinite distance B. Both source and screen must be close to ... infinity and screen should be close to the slit D. Both source and screen must be at infinity

Last Answer : D. Both source and screen must be at infinity

A diffraction grating is optically equivalent to a multiple slit system in which the number of slit , N is typically A.2000/cm B.3000/cm C.5000/cm D.1000/cm

Description : A diffraction grating is optically equivalent to a multiple slit system in which the number of slit , N is typically A.2000/cm B.3000/cm C.5000/cm D.1000/cm

Last Answer : C.5000/cm

What is the highest order spectrum which may be seen with monochromatic light of wavelength 5000 A0by means of diffraction grating with 5000 lines/cm? A. 2 B. 4 C. 8 D. 16

Description : What is the highest order spectrum which may be seen with monochromatic light of wavelength 5000 A0by means of diffraction grating with 5000 lines/cm? A. 2 B. 4 C. 8 D. 16

Last Answer : B. 4

In plane transmission grating, the angle of diffraction for second order maxima for wavelength 5 x 10 -5 cm is 30 0. Calculate the number of lines in one centimeter of the grating surface. A. 1000 lines/cm B. 5000 lines/cm C. 500 lines/cm D. 10000 lines/cm

Description : In plane transmission grating, the angle of diffraction for second order maxima for wavelength 5 x 10 -5 cm is 30 0. Calculate the number of lines in one centimeter of the grating surface. A. 1000 lines/cm B. 5000 lines/cm C. 500 lines/cm D. 10000 lines/cm

Last Answer : B. 5000 lines/cm

To find prominent diffraction , the size of diffraction object should be A. greater than wavelength of light used B. comparable to order of wavelength of light C. less than wavelength of light used D. none of these.

Description : To find prominent diffraction , the size of diffraction object should be A. greater than wavelength of light used B. comparable to order of wavelength of light C. less than wavelength of light used D. none of these.

Last Answer : B. comparable to order of wavelength of light

In Fresnel diffraction A. source of light is kept at infinite distance from the aperture B. source of light is kept at finite distance from the aperture C. Convex lens used D. aperture width is selected so that it can acts as a point source

Description : In Fresnel diffraction A. source of light is kept at infinite distance from the aperture B. source of light is kept at finite distance from the aperture C. Convex lens used D. aperture width is selected so that it can acts as a point source

Last Answer : B. source of light is kept at finite distance from the aperture

The wave nature of light is demonstrated by which of the following? A. The photoelectric effect B. Color C. The speed of light D. Diffraction

Description : The wave nature of light is demonstrated by which of the following? A. The photoelectric effect B. Color C. The speed of light D. Diffraction

Last Answer : D. Diffraction