In Newton's Ring experiments , the diameter of dark rings is proportional to A. Odd Natural numbers B. Natural Number C. Even Natural Number D. Square root of natural number

In Newton's Ring experiments , the diameter of dark rings is proportional  to  
A. Odd Natural numbers  
B. Natural Number  
C. Even Natural Number  
D. Square root of natural number
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Answer :

In Newton's Ring experiments , the diameter of dark rings is proportional  to  
A. Odd Natural numbers  
B. Natural Number  
C. Even Natural Number  
D. Square root of natural number
by

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n Newton's Ring experiments , the diameter of bright rings is proportional to A. Square root of Odd Natural numbers B. Natural Number C. Even Natural Number D. Square root of natural number

Description : n Newton's Ring experiments , the diameter of bright rings is proportional to A. Square root of Odd Natural numbers B. Natural Number C. Even Natural Number D. Square root of natural number

Last Answer : B. Natural Number

The Radius (or diameter) of bright rings in Newton’s rings is (a) Directly proportional to the square root of odd numbers (b) Inversely proportional to the square root of natural numbers (c) Directly proportional to the square root of even numbers (d) Directly proportional to the square root of natural numbers

Description : he Radius (or diameter) of bright rings in Newton's rings is (a) Directly proportional to the square root of odd numbers (b) Inversely proportional to the square root of natural numbers (c) ... to the square root of even numbers (d) Directly proportional to the square root of natural numbers

Last Answer : (a) Directly proportional to the square root of odd numbers

In Newton’s rings experiment, if we reduce the radius of curvature of Plano Convex lens to zero, what will be effect on Newton’s rings? (a)They will become more bright (b)They will become more dark ( c)They will disappear (d) They will be more dense

Description : In Newton’s rings experiment, if we reduce the radius of curvature of Plano Convex lens to zero, what will be effect on Newton’s rings? (a)They will become more bright (b)They will become more dark ( c)They will disappear (d) They will be more dense

Last Answer : ( c)They will disappear

Why in Newton’s rings the center spot is always dark? A. The thickness of the film is zero at center B. The path difference between incident ray and reflected ray is ½wavelength C. The incident ray and reflected ray undergo destructive interference D. All of above

Description : Why in Newton’s rings the center spot is always dark? A. The thickness of the film is zero at center B. The path difference between incident ray and reflected ray is ½wavelength C. The incident ray and reflected ray undergo destructive interference D. All of above

Last Answer : D. All of above

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

Description : 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

Last Answer : A. Dark

In Newton’s rings the central spot is __________. A. Always bright B. always dark C. can be bright or dark D. of blue color

Description : In Newton’s rings the central spot is __________. A. Always bright B. always dark C. can be bright or dark D. of blue color

Last Answer : C. can be bright or dark

Newton’s rings experiment is performed and radius (or diameter) is calculated. Now Plano-convex lens is replaced with another Plano-convex lens of greater Radius of curvature. What will be effect on radius (or diameter)? (a) Radius (or diameter) will remain constant but there will be more brightness (b) Radius (or diameter) will increase (c) Radius (or diameter) will decrease (d) There will be no effect

Description : Newton's rings experiment is performed and radius (or diameter) is calculated. Now Plano-convex lens is replaced with another Plano-convex lens of greater Radius of curvature. What will be effect on radius ( ... ) will increase (c) Radius (or diameter) will decrease (d) There will be no effect

Last Answer : (b) Radius (or diameter) will increase

Newton’s rings experiment is performed with air gap between lens and plate. Now that gap is filled with water. What will be effect on radius (or diameter)? (a) Radius (or diameter) will remain constant but there will be more brightness (b) Radius (or diameter) will increase (c) Radius (or diameter) will decrease (d) There will be no effect

Description : Newton's rings experiment is performed with air gap between lens and plate. Now that gap is filled with water. What will be effect on radius (or diameter)? (a) Radius (or diameter) will remain ... or diameter) will increase (c) Radius (or diameter) will decrease (d) There will be no effect

Last Answer : (c) Radius (or diameter) will decrease

In Newton’s rings experiment, if monochromatic source of light is replaced by another monochromatic source of higher wavelength. What will be the effect on radius (or diameter)? (a) Radius (or diameter) will decrease (b) Radius (or diameter) will increase (c) There will be no effect (d) Radius (or diameter) will remain constant but there will be more brightness

Description : In Newton's rings experiment, if monochromatic source of light is replaced by another monochromatic source of higher wavelength. What will be the effect on radius (or diameter)? (a) Radius (or ... be no effect (d) Radius (or diameter) will remain constant but there will be more brightness

Last Answer : (b) Radius (or diameter) will increase

In reflected light the central fringes of Newton's ring is A. dark B. Bright C. Uniform D. Non uniform

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Last Answer : A. dark

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

In Newton's ring experiment, the diameter of the 15 th ring was found to be 0.590 and that of the 5 th ring was 0.336 cm. If the radius of Plano convex lens is 100 cm, compute the wavelength of light used. A. 5885 A 0 B. 5880 A o C. 5890 A o D.5850 A

Description : In Newton's ring experiment, the diameter of the 15 th ring was found to be 0.590 and that of the 5 th ring was 0.336 cm. If the radius of Plano convex lens is 100 cm, compute the wavelength of light used. A. 5885 A 0 B. 5880 A o C. 5890 A o D.5850 A

Last Answer : B. 5880 A o

Newton’s rings are formed because of interference between the light Reflected from (a) Upper surface of Plano-convex lens and lower surface of plane glass plate (b) Lower surface of Plano-convex lens and upper surface of plane glass plate (c) Lower and upper surface of Plano-convex (d) Lower and upper surfaces of plane glass plate

Description : Newton's rings are formed because of interference between the light Reflected from (a) Upper surface of Plano-convex lens and lower surface of plane glass plate (b) Lower surface of Plano-convex ... c) Lower and upper surface of Plano-convex (d) Lower and upper surfaces of plane glass plate

Last Answer : (b) Lower surface of Plano-convex lens and upper surface of plane glass plate

Why in Newton’s rings setup, the beam splitter (mirror) is kept at 450? (a) It allows light rays to incident at 450over the top surface of Plano convex lens (b) It allows light rays to incident uniformly over the top surface of Plano convex lens (c) It allows light rays to incident parallel over the top surface of Plano convex lens (d) It allows light rays to incident at 900over the top surface of Plano convex lens

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Last Answer : (d) It allows light rays to incident at 900over the top surface of Plano convex lens

In Newton’s rings experiment, if we reduce the radius of curvature of Plano convex lens to zero, what will be effect on Newton’s rings? A. They will become brighter B. They will become darker C. They will disappear D. They will be more dense

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Last Answer : C. They will disappear

The phenomenon of Newton’s rings can be used to check the __________. A. Wavelength of monochromatic light B. phase coherence of two sources C. flatness of any glass surface D. velocity of light

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Extended source is needed in A. Young's double slit experiment B. Bi prism Experiment C. Newton’s Ring Experiment D. None of them

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

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.In Rayleigh law of scattering ,The intensity of scattered light is proportional to A. λ B. λ -2 C. λ -4 D. λ-1

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Interference pattern is observed in wedge-shaped film for monochromatic light. Now monochromatic light is replaced by white light. What will be the effect on interference pattern? (a) It will turn to dark (b) It will turn to bright (c) Bands will disappear (d) It will be a mixture of all colors

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What is the nature of interference pattern at the contact edge of wedge shaped film (a) Always bright (b) Always dark (c) Bright or dark depending upon the thickness of other end (d) Bright or dark depending upon the wavelength of the light

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Last Answer : (d) Few colored bands and then general illumination

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Last Answer : (d) Few colored bands and then general illumination

.Fringe spacing is defined as the distance between two Consecutive __________. A. Crests B. Bright fringes only C. Dark fringes only D. Bright or dark fringes

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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

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The points of constructive interference of light are__________. A. Always bright B. may be bright or dark C. always dark D. neither bright nor dark

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In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity. (A) Directly proportional to (B) Inversely proportional to (C) Inversely proportional to the square root of (D) Independent of

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Radio telescopes are better than optical telescopes because A. they can detect faint galaxies which no optical telescope can B. they can work even in cloudy conditions C. they can work during the day and night D. All of the above

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Last Answer : D. All of the above

In Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the __________ of its diameter. (A) Inverse (B) Square root (C) Second power (D) First power

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According to Newton's law of universal gravitation, any two particles of finite mass attract one another with a force which is A. Inversely proportional to the product of their masses and directly proportional to the square of their distance apart B. Inversely proportional to the product of their masses and directly proportional to their distance apart C. Directly proportional to the product of their masses and inversely proportional to their distance apart D. Directly proportional to the product of their masses and inversely proportional to the square of their distance apart

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Last Answer : Directly proportional to the product of their masses and inversely proportional to the square of their distance apart

The number of lines on plane gratings is 5000. If it is illuminated by a wavelength of light 6000 A0, how many orders will be visible? A. 3 B. 3.33 C. 4 D. 2.0

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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 : C.5000/cm

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

Which of the statements given below is not true about formation of annual rings in trees? (a) Annual rings are not prominent in trees of temperate region. (b) Annual ring is a combination of spring wood and autumn wood produced in a year. (c) Differential activity of cambium causes light and dark bands of tissue-early and late wood respectively. (d) Activity of cambium depends upon variation in climate.

Description : Which of the statements given below is not true about formation of annual rings in trees? (a) Annual rings are not prominent in trees of temperate region. (b) Annual ring is a combination ... of tissue-early and late wood respectively. (d) Activity of cambium depends upon variation in climate.

Last Answer : a) Annual rings are not prominent in trees of temperate region

In case of thin film of non-uniform thickness, when illuminated with white light, the film appears colored. This is due to change of what factor? (a) Conditions for path difference at different points of film (b) Change in optical path difference at different points of film (c) Thickness of film is different at different points of film (d) All of above

Description : In case of thin film of non-uniform thickness, when illuminated with white light, the film appears colored. This is due to change of what factor? (a) Conditions for path difference at different points of ... of film (c) Thickness of film is different at different points of film (d) All of above

Last Answer : (d) All of above

Interference pattern is observed in wedge-shaped film and bandwidth is noted. Now the angle of wedge is reduced to zero. What will be the effect on Bandwidth? (a) Bandwidth increases (b) Bandwidth decreases (c) Bands will disappear (d) There will not any effect

Description : Interference pattern is observed in wedge-shaped film and bandwidth is noted. Now the angle of wedge is reduced to zero. What will be the effect on Bandwidth? (a) Bandwidth increases (b) Bandwidth decreases (c) Bands will disappear (d) There will not any effect

Last Answer : (c) Bands will disappear

Interference pattern is observed in wedge-shaped film and bandwidth is noted. Now the angle of wedge is reduced. What will be the effect on bandwidth? (a) Bandwidth increases (b) Bandwidth decreases (c) Bands will disappear (d) There will not any effect

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Last Answer : B) BANDWIDTH DECREASES

Interference pattern is observed in wedge-shaped film and bandwidth is noted. Now the thin film is replaced by the film of higher refractive index. What will be the effect on bandwidth? (a) Bandwidth increases (b) Bandwidth decreases (c) Bands will merge (d) There will not any effect

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Last Answer : (b) Bandwidth decreases

What is the nature of interference pattern for thin film of wedge shaped (a) Concave outside (b) Convex outside (b) Equally spaced (d) Concave inside

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Last Answer : (b) Convex outside

In wedge shaped film the interference pattern has nature (a) Parallel to the end where thickness is non-zero (b) Perpendicular to contact edge (c) Parallel to contact edge (d) Perpendicular to the end where thickness is non-zero

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Last Answer : (c) Parallel to contact edge

A wedge shaped thin has (a) Non-uniform thickness (b) Zero thickness at one end and it increasing towards other end (c) Zero thickness at both ends (d) Thickness increase and decrease alternately

Description : A wedge shaped thin has (a) Non-uniform thickness (b) Zero thickness at one end and it increasing towards other end (c) Zero thickness at both ends (d) Thickness increase and decrease alternately

Last Answer : b) Zero thickness at one end and it increasing towards other end

A thin film is observed in white light. The color of the film seen at a particular point depends upon (a)Location of observer (b)Width of the source (c) Distance of the source (d) Brightness of the source

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Last Answer : (a)Location of observer

When a light wave suffers reflection at the interface between air and glass medium, the change of wavelength of the reflected wave in air is equal to (a) 0 (b) λ/2 (c) λ (d) 2λ

Description : When a light wave suffers reflection at the interface between air and glass medium, the change of wavelength of the reflected wave in air is equal to (a) 0 (b) λ/2 (c) λ (d) 2λ

Last Answer : (b) λ/2

When a light wave suffers reflection at the interface between air and glass medium, the change of phase of the reflected wave in air is equal to (a) 0 (b) π (c) 2π (d) π/2

Description : When a light wave suffers reflection at the interface between air and glass medium, the change of phase of the reflected wave in air is equal to (a) 0 (b) π (c) 2π (d) π/2

Last Answer : (b) π

If you look perpendicular at thin film and move yourself away from the film (staying perpendicular to the film), you will notice (a) Reflected light becomes brighter and brighter (b) Reflected light becomes darker and darker (c) Reflected light alternates between darker and brighter (d) None of the Above

Description : If you look perpendicular at thin film and move yourself away from the film (staying perpendicular to the film), you will notice (a) Reflected light becomes brighter and brighter (b) Reflected ... and darker (c) Reflected light alternates between darker and brighter (d) None of the Above

Last Answer : (c) Reflected light alternates between darker and brighter

The interference in thin films is because (a) The film reflects some light (b) The film is thin enough so that refracted ray is close to reflected ray (c) The reflected ray undergo path change of λ/2 (d) All of above

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Last Answer : (d) All of above

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

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Last Answer : (a) Interference