Critical reflection will take place if light travels from (a) Air to water (b) Glass to air (c) Water to glass (d) Air to glass

Critical reflection will take place if light travels from (a) Air to water (b) Glass to air (c) Water to glass (d) Air to glass
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When a beam of light travels through media of two different densities, if theangle of incidence isgreater than the critical angle, _______ occurs. A) reflection B) refraction C) incidence D) criticism

Description : When a beam of light travels through media of two different densities, if theangle of incidence isgreater than the critical angle, _______ occurs. A) reflection B) refraction C) incidence D) criticism

Last Answer : reflection

Total internal reflection can take place when light travels from which thing? -Do You Know?

Description : Total internal reflection can take place when light travels from which thing? -Do You Know?

Last Answer : answer:

Total internal reflection can take place when light travels from which thing?

Description : Total internal reflection can take place when light travels from which thing?

Last Answer : Diamond to glass

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Total internal reflection can not take place when light goes from – (1) glass to water (2) water to glass (3) water to air (4) glass to air

Description : Total internal reflection can not take place when light goes from – (1) glass to water (2) water to glass (3) water to air (4) glass to air

Last Answer : (2) water to glass Explanation: For total internal reflection to occur the light must travel from a dense medium to a less dense medium (e.g. glass to air or water to air). It will not happen for light traveling from water (n=1.333) towards glass (n=1.52).

Total internal reflection can not take place when light goes from : (1) glass to water (2) water to glass (3) water to air (4) glass to air

Description : Total internal reflection can not take place when light goes from : (1) glass to water (2) water to glass (3) water to air (4) glass to air

Last Answer : water to glass

The refractive indices of four media A, B, C and D are given in the following table: light-reflection-and-refraction-chapter-wise-important-questions-class-10-science-9 If light, travels from one medium to another, in which case the change in speed will be (i) minimum, (ii) maximum? -Physics

Description : The refractive indices of four media A, B, C and D are given in the following table: light-reflection-and-refraction-chapter-wise-important-questions-class-10-science-9 If light, travels from one medium to another, in which case the change in speed will be (i) minimum, (ii) maximum? -Physics

Last Answer : (i) Minimum change is seen as light moves between 1.50 and 1.52, i.e. B and C. (ii) Maximum change when light moves between 1.33 and 2.40, i.e. A and D.

Total internal reflection takes place if the light ray strikes the interface at an angle with what relationship to the critical angle? a. Less than b. Grater than c. Equal to d. Zero

Description : Total internal reflection takes place if the light ray strikes the interface at an angle with what relationship to the critical angle? a. Less than b. Grater than c. Equal to d. Zero

Last Answer : b. Grater than

Total internal reflection takes place if the light ray strikes the interface at an angle with what relationship to the critical angle? ∙ A. less than ∙ B. greater than ∙ C. equal to ∙ D. zero

Description : Total internal reflection takes place if the light ray strikes the interface at an angle with what relationship to the critical angle? ∙ A. less than ∙ B. greater than ∙ C. equal to ∙ D. zero

Last Answer : ∙ B. greater than

Total internal reflection takes place if the light ray strikes the interface at an angle with what relationship to the critical angle? ∙ a. Less than ∙ b. Grater than ∙ c. Equal to ∙ d. Zer

Description : Total internal reflection takes place if the light ray strikes the interface at an angle with what relationship to the critical angle? ∙ a. Less than ∙ b. Grater than ∙ c. Equal to ∙ d. Zer

Last Answer : ∙ b. Grater than

The phenomenon of total internal reflection may occur when light is passing from (a) Air to glass (b) Air to water (c) Air to oil (d) Glass to air

Description : The phenomenon of total internal reflection may occur when light is passing from (a) Air to glass (b) Air to water (c) Air to oil (d) Glass to air

Last Answer : Ans:(d)

For a ray of light to suffer total internal reflection it has to pass from – (1) glass to water (2) water to glass (3) air to water (4) air to glass

Description : For a ray of light to suffer total internal reflection it has to pass from – (1) glass to water (2) water to glass (3) air to water (4) air to glass

Last Answer : (3) air to water Explanation: Total internal reflection is an optical phenomenon that happens when a ray of light strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface.

For a ray of light to suffer total internal reflection it has to pass from : (1) glass to water (2) water to glass (3) air to water (4) air to glass

Description : For a ray of light to suffer total internal reflection it has to pass from : (1) glass to water (2) water to glass (3) air to water (4) air to glass

Last Answer : air to water

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

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Last Answer : (b) π

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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Last Answer : B. π

Light travels fastest A. In a vacuum B. through water C. Through glass D. through diamond

Description : Light travels fastest A. In a vacuum B. through water C. Through glass D. through diamond

Last Answer : A. In a vacuum

A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers. (1) reflection (2) refraction (3) diffraction (4) total internal reflection

Description : A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers. (1) reflection (2) refraction (3) diffraction (4) total internal reflection

Last Answer : (4) total internal reflection Explanation: If the angle of incidence of light ray in the denser medium is greater than the critical angle of the concerned media pair, the light is not at all reflected in to the rarer medium but is totally reflected. This is known as 'total internal reflection'.

Optical fiber uses reflection to guide light through a channel, in which angle of incidence is ................. the critical angle. (A) equal to (B) less than (C) greater than (D) less than or equal to

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A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers. (1) reflection (2) refraction (3) diffraction (4) total internal reflection

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Last Answer :  total internal reflection

The maximum angle in which external light rays may strike the air/glass interface and still propagate down the fiber. ∙ A. Acceptance cone half-angle ∙ B. Acceptance cone ∙ C. Critical angle ∙ D. Angle of incidence

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Last Answer : A. Acceptance cone half-angle

A light ray traveling from glass into air strikes the glass-air surface at an angle 50 degrees to the normal. If the critical angle for the glass-air combination is 42 degrees, the percentage of light reflected from the surface is w) 6 x) 25 y) 38 z) 100

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Last Answer : ANSWER: Z -- 100

Which of these travels in glass with minimum velocity? (1) red light (2) violet light (3) green light (4) yellow light

Description : Which of these travels in glass with minimum velocity? (1) red light (2) violet light (3) green light (4) yellow light

Last Answer : (2) violet light Explanation: Red light has a longer wavelength than violet light and the other colours of visible light have intermediate wavelengths. As light passes from air into glass, there is ... and is refracted the least, while violet waves travel the slowest and is refracted the most.

Which of these travels in glass with minimum velocity ? (1) red light (2) violet light (3) green light (4) yellow light

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Last Answer : violet light

Which property of light best explains the way a straw appears to “break” when placed in a glass of water and viewed from the side? a) Reflection b) Refraction c) Absorption d) Water waves

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Last Answer : b) Refraction

When a pencil is dipped in glass of water it appears bent near the surface of water due to ______ of light. a) refraction b)reflection c)bouncing back of light d)none

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Diffused reflection takes place through a) metal b)glass c)wood d)thin transparent sheet

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Last Answer : c)wood

Critical angle of light passing from glass to water is minimum for which colour?

Description : Critical angle of light passing from glass to water is minimum for which colour?

Last Answer : Violet colour

1. Critical angle of. light passing from glass to water is minimum for which colour? 2. With whose assistance was Bokaro Steel Limited established? 3. Where were the xxvii (1996) Summer Olympic games were held? 4. Why was Farakka Barrage commissioned? 5. In the Sultanate period, which was the highest rural authority for land revenue?

Description : 1. Critical angle of. light passing from glass to water is minimum for which colour? 2. With whose assistance was Bokaro Steel Limited established? 3. Where were the xxvii (1996) Summer Olympic games ... can be drawn on the earth's surface passes through where? 20. By whom was Zero invented?

Last Answer : Answer : 1. Violet colour 2. Soviet Union 3. Atlanta 4. Save Kolkata port 5. Chowdhary 6. 10% 7. Governor-General 8. 2CaSO4 .H2 O 9. Atlantic ocean 10. Caste system 11. Football 12. Excise duties ... . Government of India Act, 1858 17. Air 18. Sri Sri Ravi Shankar 19. Equator 20. An unknown Indian 

What does not happen when light travels from water into air?

Description : What does not happen when light travels from water into air?

Last Answer : The following are some things that do not happen:The water decomposes into hydrogen and oxygen.The air gets sucked into the water, forming a whirlpool.The hydrogen in the water fuses, producing ... hydrogen in the water forming ammonia gas.The surface of the water becomes electrically charged.etc.

What is the condition for total internal reflection? (a) Angle of incidence is less than to critical angle (b) Angle of incidence is equal to critical angle (c) Angle of incidence is greater than to critical angle (d) None of these

Description : What is the condition for total internal reflection? (a) Angle of incidence is less than to critical angle (b) Angle of incidence is equal to critical angle (c) Angle of incidence is greater than to critical angle (d) None of these

Last Answer : (c) Angle of incidence is greater than to critical angle

The critical angle is defined as the angle of incidence at which the total internal reflection starts to occur. State True/False. a) True b) False

Description : The critical angle is defined as the angle of incidence at which the total internal reflection starts to occur. State True/False. a) True b) False

Last Answer : a) True

Light travels through air or vacuum at a speed of 3?

Description : Light travels through air or vacuum at a speed of 3?

Last Answer : :x 108m/s

In air-core cable the surge voltage travels approximately at the speed of light and a cable of 100m length gives a delay of a. 0.666μsec b. 0.333μsec c. 1.555μsec d. 1μsec

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Last Answer : In air-core cable the surge voltage travels approximately at the speed of light and a cable of 100m length gives a delay of a. 0.666μsec b. 0.333μsec c. 1.555μsec d. 1μsec 

Mirage is caused due to (a) total Internal Reflection of light by the various layers of air (b) illusion of the presence of water (c) result of refraction of light from a non-uniform medium (d) during sunny days when driving on a roadway

Description : Mirage is caused due to (a) total Internal Reflection of light by the various layers of air (b) illusion of the presence of water (c) result of refraction of light from a non-uniform medium (d) during sunny days when driving on a roadway

Last Answer : (a) total Internal Reflection of light by the various layers of air

Which one of the following processes is responsible for the glittering of air bubble rising through water? (1) Reflection of light (2) Refraction of light (3) Total internal reflection of light (4) Scattering of light

Description : Which one of the following processes is responsible for the glittering of air bubble rising through water? (1) Reflection of light (2) Refraction of light (3) Total internal reflection of light (4) Scattering of light

Last Answer : (3) Total internal reflection of light Explanation: Total internal reflection is responsible for glittering which occurs when the light from a denser media (liquid) tries to enter less dense media (air in bubble). This reflected light when captured by our eyes is seen as glittering.

Which one of the following processes is responsible for the glittering of air bubble rising through water? (1) Reflection of light (2) Refraction of light (3) Total internal reflection of light (4) Scattering of light

Description : Which one of the following processes is responsible for the glittering of air bubble rising through water? (1) Reflection of light (2) Refraction of light (3) Total internal reflection of light (4) Scattering of light

Last Answer : Total internal reflection of light

The mirage is seen in a hot desert because of (a) The density of the layer of air increases with altitude (b) The density of the layer of air decreases with altitude (c) The reflection of light from the layers of sand (d) The total internal reflection from sand

Description : The mirage is seen in a hot desert because of (a) The density of the layer of air increases with altitude (b) The density of the layer of air decreases with altitude (c) The reflection of light from the layers of sand (d) The total internal reflection from sand

Last Answer : Ans:(a)

Blue of the sky is due to the (a) Refraction of white light by the atmosphere (b) Reflection of white light by the earth (c) Scattering of white light by molecules of air (d) Interference of white light

Description : Blue of the sky is due to the (a) Refraction of white light by the atmosphere (b) Reflection of white light by the earth (c) Scattering of white light by molecules of air (d) Interference of white light

Last Answer : Ans:(c)

A mirage occurs because of – (1) Reflection by hot ground (2) Total internal reflection by layers of air (3) Interference of light (4) Diffraction of light

Description : A mirage occurs because of – (1) Reflection by hot ground (2) Total internal reflection by layers of air (3) Interference of light (4) Diffraction of light

Last Answer : (2) Total internal reflection by layers of air Explanation: A mirage is a naturally occurring optical phenomenon in which light rays are bent to produce a displaced image of distant objects or the ... -changing mirage. Cold air is denser than warm air and has therefore a greater refractive index.

The ratio of speed of light in air to the speed of light in another substance is called the a. Speed factor b. Index of reflection c. Index of refraction d. Dielectric constant

Description : The ratio of speed of light in air to the speed of light in another substance is called the a. Speed factor b. Index of reflection c. Index of refraction d. Dielectric constant

Last Answer : c. Index of refraction

The ratio of the speed of light in air to the speed of light in another substance is called ∙ A. speed factor ∙ B. index of reflection ∙ C. index of refraction ∙ D. speed gain

Description : The ratio of the speed of light in air to the speed of light in another substance is called ∙ A. speed factor ∙ B. index of reflection ∙ C. index of refraction ∙ D. speed gain

Last Answer : ∙ B. index of reflection

The ratio of speed of light in air to the speed of light in another substance is called the ∙ a. Speed factor ∙ b. Index of reflection ∙ c. Index of refraction ∙ d. Dielectric constant

Description : The ratio of speed of light in air to the speed of light in another substance is called the ∙ a. Speed factor ∙ b. Index of reflection ∙ c. Index of refraction ∙ d. Dielectric constant

Last Answer : b. Index of reflection

A mirage occurs because of (1) reflection by hot ground (2) total internal reflection by layers of air (3) interference of light (4) diffraction of light

Description : A mirage occurs because of (1) reflection by hot ground (2) total internal reflection by layers of air (3) interference of light (4) diffraction of light

Last Answer : total internal reflection by layers of air

Any ideas about what to do with a robin that's established his breeding territory at the end of my house and his prime rival is his reflection in my sliding glass door?

Description : Any ideas about what to do with a robin that's established his breeding territory at the end of my house and his prime rival is his reflection in my sliding glass door?

Last Answer : I think you may find this useful. It recommends trying to put cling film or something over the outside of the glass to remove the reflection

I'm curious why my dog often sees his own reflection in a large glass door and barks at himself as if there is another dog outside, but when I have him sit in front of a full-length mirror he never reacts to his own reflection?

Description : I'm curious why my dog often sees his own reflection in a large glass door and barks at himself as if there is another dog outside, but when I have him sit in front of a full-length mirror he never reacts to his own reflection?

Last Answer : I think the difference is that the dog in the glass is outside the boundary of the den—your house—and thus is not recognized as himself. Therefore, barking.

Be you ever so quick, with vision keen, by your eyes, we are never seen. Unless perchance it should come to pass, you see our reflection in a looking glass. What are we? -Riddles

Description : Be you ever so quick, with vision keen, by your eyes, we are never seen. Unless perchance it should come to pass, you see our reflection in a looking glass. What are we? -Riddles

Last Answer : Your own eyes.

Light waves are different from sound waves in that 1. Light waves are electromagnetic but sound waves are not 2. Light waves can travel through water but sound waves cannot 3. Light travels with the same speed in all media 4. Light waves produce interference but sound waves do not 5. Light can travel through vacuum but sound cannot Which of the above statements is/are correct? (a) 1 and 5 (b) 2 and 3 (c) 3 and 4 (d) 1 and 4

Description : Light waves are different from sound waves in that 1. Light waves are electromagnetic but sound waves are not 2. Light waves can travel through water but sound waves cannot 3. Light travels with the same speed in all media 4. Light ... /are correct? (a) 1 and 5 (b) 2 and 3 (c) 3 and 4 (d) 1 and 4

Last Answer : Ans:(a)

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

Description : 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 ... A. absorbed B. totally reflected C. Partially reflected and partially transmitted D. Totally transmitted

Last Answer : C. Partially reflected and partially transmitted

Sound travels fastest in (a) Air (b) Water (c) Vacuum (d) Steel

Description : Sound travels fastest in (a) Air (b) Water (c) Vacuum (d) Steel

Last Answer : Ans:(d)