For all transparent material substances, the index of refraction A. A.is less than 1 B. B.is greater than 1 C. C.is equal to 1 D. Could be any of the given answers; it all depends on optical density

For all transparent material substances, the index of refraction  A. A.is less than 1  
B. B.is greater than 1  
C. C.is equal to 1  
D. Could be any of the given answers; it all depends on optical density
by

1 Answer

Answer :

B. B.is greater than 1
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Related questions

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

Description : 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 ... greater than the speed of light in vacuum C. Refraction is not possible D. Reflection is not possible

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

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Last Answer : B. Shorter than

Light enters air from water. The angle of refraction will be A. Greater than the angle of incidence. B. Equal to the angle of incidence. C. Less than the angle of incidence. D. None of these

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The index of refraction can be considered: w) a ratio of material thickness between substances x) a ratio of velocities of light in different materials y) a ratio of mass between materials z) to have the units of photons

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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 speed of light in material A is 1.25 times as large as it is in material B. What is the ratio of the refractive indices, µA /µB of these materials? A.1.50 B.1.00 C.0.800 D.1.25

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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

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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

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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

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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.2 π D.π /2

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The angle of incidence for a wave A. can be measured between the incident ray and the normal B. can be measured between the incident wave front and the boundary C. is equal to the angle of reflection D. all of the above

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Last Answer : D. all of the above

Photons are incident from vacuum on a transparent material with a refractive index n for a given wavelength. Determine the momentum of the incident ph

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Resolving power of grating is given by A. λ/2 B. λ/dλ C. dλ/λ D. none of these

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The core of the optical fiber has ______. A. A medium index of refraction B. A lower index of refraction than the cladding C. A lower index of refraction than air D. A higher index of refraction than the cladding

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Last Answer : D. A higher index of refraction than the cladding

Compared to the core, the index of refraction of the cladding must be: a. the same b. greater c. less d. doesn’t have an index of refraction

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Last Answer : c. less

Optical fibers for telecommunications are typically about _____ mils thick and consists of a glass core, a glass cladding of lower index of refraction, and a protective coating ∙ a. 5 ∙ b. 6 ∙ c. 7 ∙ d. 8

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To observe interference in thin films with a light of wavelength λ, the thickness of the film (a) Should be much smaller than λ (b) Should be a few thousand times of λ (c) Should be of the order of λ (d) Should be of the order of nanometer

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A film is said to be thin if its thickness is (a) Much smaller than wavelength of light (b) Comparable with one wavelength of light (c) Of the order of nanometer (10-9 m) (d) Of the order of Pico meter (10-12 m)

Description : A film is said to be thin if its thickness is (a) Much smaller than wavelength of light (b) Comparable with one wavelength of light (c) Of the order of nanometer (10-9 m) (d) Of the order of Pico meter (10-12 m)

Last Answer : (b) Comparable with one wavelength of light

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 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

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

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

Last Answer : (a) Interference

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

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

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

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

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

Description : 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

Last Answer : (d) It will be a mixture of all colors

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

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

Description : 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

Last Answer : (b) Convex outside

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 : (b) Always dark

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

In interference experiment, by keeping all other parameters constant, if you see the thin film interference from different angles, you will observe (a)Uniform illumination of screen (b) Uniform darkness on the screen (c) Equally spaced dark and white bands (d) Few colored bands and then general illumination

Description : In interference experiment, by keeping all other parameters constant, if you see the thin film interference from different angles, you will observe (a)Uniform illumination of screen (b) Uniform ... c) Equally spaced dark and white bands (d) Few colored bands and then general illumination

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

In interference experiment, monochromatic light is replaced by white light, we will see (a) Uniform illumination of screen (b) Uniform darkness on the screen (c) Equally spaced dark and white bands (d) Few colored bands and then general illumination

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