Diamonds are glittering and attractive because light incident on them undergoes – (1) highest refraction (2) multiple internal reflections (3) multiple surface reflections (4) hundred percent transmission

Diamonds are glittering and attractive because light incident on them undergoes – (1) highest refraction (2) multiple internal reflections (3) multiple surface reflections (4) hundred percent transmission
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(2) multiple internal reflections Explanation: Diamond has remarkable optical characteristics. Because of its extremely rigid lattice, it can be contaminated by very few types of impurities, such as boron and nitrogen. Combined with wide transparency', this results in the clear, colourless appearance of most natural diamonds. Small amounts of defects or impurities (about one per million of lattice atoms) colour diamond blue (boron), yellow (nitrogen), brown (lattice defects), green (radiation exposure), purple, pink, orange or red.
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Diamonds are glittering and attractive because light incident on them undergoes (1) highest refraction (2) multiple internal reflections (3) multiple surface reflections (4) hundred percent transmission

Description : Diamonds are glittering and attractive because light incident on them undergoes (1) highest refraction (2) multiple internal reflections (3) multiple surface reflections (4) hundred percent transmission

Last Answer : multiple internal reflections

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

If a light ray IM is incident on the surface AB as shown, identify the correct emergent ray. light-reflection-and-refraction-chapter-wise-important-questions-class-10-science-8 -Physics

Description : If a light ray IM is incident on the surface AB as shown, identify the correct emergent ray. light-reflection-and-refraction-chapter-wise-important-questions-class-10-science-8 -Physics

Last Answer : Ray NQ, as it has to be parallel to ray OS.

Stars in the sky appear to twinkle due to – (1) a series of refractions (2) a series of reflections (3) a surface tension phenomenon (4) multiple diminishing brightness

Description : Stars in the sky appear to twinkle due to – (1) a series of refractions (2) a series of reflections (3) a surface tension phenomenon (4) multiple diminishing brightness

Last Answer : (1) a series of refractions Explanation: The movement of air (sometimes called turbulence) in the atmosphere of Earth causes a series of refractions which makes the starlight to get slightly bent as it ... directly and some gets bent slightly away. To our eyes, this makes the star seem to twinkle.

Stars in the sky appear to twinkle due to (1) a series of refractions (2) a series of reflections (3) a surface tension phenomenon (4) multiple diminishing brightness

Description : Stars in the sky appear to twinkle due to (1) a series of refractions (2) a series of reflections (3) a surface tension phenomenon (4) multiple diminishing brightness 

Last Answer : a series of refractions

Rainbows are produced when sunlight (1) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction (2) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection. (3) Incident on raindrops hanging in the atmosphere is dispersed after suffering reflection. (4) None of the given statements is correct.

Description : Rainbows are produced when sunlight (1) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction (2) Incident on rain drops hanging in the atmosphere is dispersed ... atmosphere is dispersed after suffering reflection. (4) None of the given statements is correct.

Last Answer : (2) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection. Explanation: When the light rays from the Sun are incident on water drops hanging in ... results in production of colour arcs which appear hanging in the sky and known as rainbow.

Rainbows are produced when sunlight : (1) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction (2) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection. (3) Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection. (4) None of the given statements is correct.

Description : Rainbows are produced when sunlight : (1) Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction (2) Incident on rain drops hanging in the atmosphere is dispersed ... atmosphere is dispresed after suffering reflection. (4) None of the given statements is correct.

Last Answer : Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.

Coherent light of a single frequency passes through a double slit with a separation d, to produce a pattern on a screen as distance D from the slits. What would cause the separation between adjacent minima on the screen to increase? A. A. increase the index of refraction of the medium in which the setup is immersed B. increase the separation d between the slits C. increase the distance D. increase the frequency of the incident light

Description : Coherent light of a single frequency passes through a double slit with a separation d, to produce a pattern on a screen as distance D from the slits. What would cause the separation between adjacent ... d between the slits C. increase the distance D. increase the frequency of the incident light

Last Answer : B. increase the separation d between the slits

.A beam of light is incident on a large block of glass. The index of refraction of the glass is greater than one. Is the wavelength of the light in the glass? A. Longer than B. Shorter than C. The same as the wavelength of the light in the air? D. None of above

Description : .A beam of light is incident on a large block of glass. The index of refraction of the glass is greater than one. Is the wavelength of the light in the glass? A. Longer than B. Shorter than C. The same as the wavelength of the light in the air? D. None of above

Last Answer : B. Shorter than

A beam of light is incident on a large block of glass. The index of refraction of the glass is greater than one. Is the wavelength of the light in the glass: w) longer than x) shorter than y) the same as the wavelength of the light in the air?

Description : A beam of light is incident on a large block of glass. The index of refraction of the glass is greater than one. Is the wavelength of the light in the glass: w) longer than x) shorter than y) the same as the wavelength of the light in the air?

Last Answer : ANSWER: X -- SHORTER THAN 

Light is normally incident on a thin soap film and is reflected. If the wavelength of this light is "L" and the index of refraction of the soap film is "N", complete destructive interference will occur for a film thickness of: w) L / 8N x) L / 4N y) L / 2N z) 3L / 4N

Description : Light is normally incident on a thin soap film and is reflected. If the wavelength of this light is "L" and the index of refraction of the soap film is "N", complete destructive interference will occur for a film thickness of: w) L / 8N x) L / 4N y) L / 2N z) 3L / 4N

Last Answer : ANSWER: Y -- L / 2N 

What is the term for multiple reflections of sound waves?

Description : What is the term for multiple reflections of sound waves?

Last Answer : Reverberation.

‘Mirage' is an example of - (1) Refraction of light only (2) Total internal reflection of light only (3) Refraction and total internal reflection of light (4) Dispersion of light only

Description : ‘Mirage' is an example of - (1) Refraction of light only (2) Total internal reflection of light only (3) Refraction and total internal reflection of light (4) Dispersion of light only

Last Answer : (3) refraction and total internal reflection of light

'Mirage' is an example of – (1) refraction of light only (2) total internal, reflection of light only (3) refraction and total internal reflection of light (4) dispersion of light only

Description : 'Mirage' is an example of – (1) refraction of light only (2) total internal, reflection of light only (3) refraction and total internal reflection of light (4) dispersion of light only

Last Answer : (3) refraction and total internal reflection of light Explanation: A mirage is a naturally occurring optical phenomenon in which light rays are bent to produce a displaced image of distant objects ... significantly warmer air, the light rays bend away from the direction of the temperature gradient.

An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media". This phenomenon is known as: (A) Fresnel reflection (B) Fresnel refraction (C) Snell's law (D) None of these

Description : An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted ... A) Fresnel reflection (B) Fresnel refraction (C) Snell's law (D) None of these

Last Answer : Answer: Option A

According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2); (A) The angle of incidence is equal to the angle of refraction (B) The angle of refraction r) is given by sin i (C) Both (a) and (b) (D) Neither (a) nor (b)

Description : According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2); (A) The angle of incidence is equal to the angle of refraction (B) The angle of ... r) is given by sin i (C) Both (a) and (b) (D) Neither (a) nor (b)

Last Answer : Answer: Option B

A man is sitting by the side of a large lake. He hears the utterances of bathers with their mouth close to water surface more clearly than if they were at same distance away on land. This effect is due to sound waves undergoing (a) Reflection (b) Refraction (c) Dispersion (d) Total internal reflection

Description : A man is sitting by the side of a large lake. He hears the utterances of bathers with their mouth close to water surface more clearly than if they were at same distance away on land. This ... due to sound waves undergoing (a) Reflection (b) Refraction (c) Dispersion (d) Total internal reflection

Last Answer : Ans:(c)

If Vampires cast no shadows, and are not visible in reflections, it means their bodies do not interact with physical light. So, how are they visible at all?

Description : If Vampires cast no shadows, and are not visible in reflections, it means their bodies do not interact with physical light. So, how are they visible at all?

Last Answer : That no reflection thing is sugarcoated Western bullshit. Original vampires from Slavic mythology were ghosts of people that weren't burried properly or were too evil/wicked/ cruel during their lifetime. ... also weren't killed with silver, but by stabbing their vessel body with a wooden spear.

An explorer is riding his camel in the desert. Up ahead he sees what appears to be a pool of water. He can tell if it is a real pool of water or a mirage by putting on his polarized sun glasses because: w) the mirage is polarized and reflections from the water are not x) reflections from water are polarized while the mirage is not y) neither are polarized so one will not be able to discern a difference z) both are polarized so one will not be able to discern a difference

Description : An explorer is riding his camel in the desert. Up ahead he sees what appears to be a pool of water. He can tell if it is a real pool of water or a mirage by putting on his polarized sun ... not be able to discern a difference z) both are polarized so one will not be able to discern a difference 

Last Answer : ANSWER: X -- REFLECTIONS FROM WATER ARE POLARIZED WHILE THE MIRAGE S NOT

The splitting of white light into its components is due to: (1) Reflection (2) Refraction (3) Transmission (4) Dispersion

Description : The splitting of white light into its components is due to: (1) Reflection (2) Refraction (3) Transmission (4) Dispersion

Last Answer : (4) Dispersion Explanation: Dispersion is used to separate a beam of white light into its constituent spectrum of colours. This phenomenon leads to rainbow.

The splitting of white light into its components is due to: (1) reflection (2) refraction (3) transmission (4) dispersion

Description : The splitting of white light into its components is due to: (1) reflection (2) refraction (3) transmission (4) dispersion

Last Answer : dispersion

Glittering points that downward thrust, sparkling spears that never rust.What is it? -Riddles

Description : Glittering points that downward thrust, sparkling spears that never rust.What is it? -Riddles

Last Answer : An Icicle.

Glittering points that downward thrust, Sparkling spears that never rust. What is it? -Riddles

Description : Glittering points that downward thrust, Sparkling spears that never rust. What is it? -Riddles

Last Answer : An icicle.

Glittering points that downward thrust, sparkling spears That never rust. what am I? -Riddles

Description : Glittering points that downward thrust, sparkling spears That never rust. what am I? -Riddles

Last Answer : Icicles.

‘Mirage' is an example of - (1) Refraction of light only (2) Total internal reflection of light only (3) Refraction and total internal reflection of light (4) Dispersion of light only

Description : ‘Mirage' is an example of - (1) Refraction of light only (2) Total internal reflection of light only (3) Refraction and total internal reflection of light (4) Dispersion of light only

Last Answer : (3) refraction and total internal reflection of light

'Mirage' is an example of – (1) refraction of light only (2) total internal, reflection of light only (3) refraction and total internal reflection of light (4) dispersion of light only

Description : 'Mirage' is an example of – (1) refraction of light only (2) total internal, reflection of light only (3) refraction and total internal reflection of light (4) dispersion of light only

Last Answer : (3) refraction and total internal reflection of light Explanation: A mirage is a naturally occurring optical phenomenon in which light rays are bent to produce a displaced image of distant objects ... significantly warmer air, the light rays bend away from the direction of the temperature gradient.

A water tank appears shallower when it is viewed from top due to – (1) rectilinear propagation of light (2) reflection (3) total internal reflection (4) refraction

Description : A water tank appears shallower when it is viewed from top due to – (1) rectilinear propagation of light (2) reflection (3) total internal reflection (4) refraction

Last Answer : (4) refraction Explanation: This phenomenon is because of refraction of light. The lines of sight intersect at a higher position than where the actual rays originated. This causes the water to appear shallower than it really is.

Formation of shadows can be explained by - (1) rectilinear propagation of light (2) reflection (3) refraction (4) total internal reflection

Description : Formation of shadows can be explained by - (1) rectilinear propagation of light (2) reflection (3) refraction (4) total internal reflection

Last Answer : (1) rectilinear propagation of light Explanation: In this position, the head light will be at the principal focus so that the rays of light falling on the concave mirror will be rendered parallel

A water tank appears shallower when it is viewed from top due to – (1) rectilinear propagation of light (2) reflection (3) total internal reflection (4) refraction

Description : A water tank appears shallower when it is viewed from top due to – (1) rectilinear propagation of light (2) reflection (3) total internal reflection (4) refraction

Last Answer : (4) refraction Explanation: This phenomenon is because of refraction of light. The lines of sight intersect at a higher position than where the actual rays originated. This causes the water to appear ... depth that the water appears to be when viewed from above is known as the apparent depth.

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'.

What is the reason for twinkling of stars? (1) Dispersion of light (2) Total internal reflection (3) Atmospheric reflection (4) Atmospheric refraction

Description : What is the reason for twinkling of stars? (1) Dispersion of light (2) Total internal reflection (3) Atmospheric reflection (4) Atmospheric refraction

Last Answer : (4) Atmospheric refraction Explanation: Seismometers are instrument that measures motion of the ground, including those of seismic waves generated by earthquakes, volcanic eruptions and other seismic ... of these different sources. Seismograph is another Greek term meaning to draw siesmo waves.

Formation of shadows can be explained by - (1) rectilinear propagation of light (2) reflection (3) refraction (4) total internal reflection

Description : Formation of shadows can be explained by - (1) rectilinear propagation of light (2) reflection (3) refraction (4) total internal reflection

Last Answer : (1) rectilinear propagation of light Explanation: In this position, the head light will be at the principal focus so that the rays of light falling on the concave mirror will be rendered parallel.

The sparkling of a diamond is due to – (1) total internal reflection of light (2) interference of light (3) polarisation of light (4) refraction of light

Description : The sparkling of a diamond is due to – (1) total internal reflection of light (2) interference of light (3) polarisation of light (4) refraction of light

Last Answer : (1) total internal reflection of light Explanation: Diamonds sparkle because of the total internal reflection of light. Diamonds have a very high refractive index, meaning they slow light down much more ... so that light seems to get 'trapped' within the diamond giving it it's sparkly appearance.

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 of the following phenomena of light are involved in the formation of a rainbow? (a) Reflection, refraction and dispersion (b) Refraction, dispersion and total internal reflection (c) Refraction, dispersion and internal reflection (d) Dispersion, scattering and total internal reflection

Description : Which of the following phenomena of light are involved in the formation of a rainbow? (a) Reflection, refraction and dispersion (b) Refraction, dispersion and total internal reflection (c) Refraction, dispersion and internal reflection (d) Dispersion, scattering and total internal reflection

Last Answer : (b) Refraction, dispersion and total internal reflection

Light propagates in multimode graded-index fibers according to refraction and total internal reflection. When does total internal reflection occur?

Description : Light propagates in multimode graded-index fibers according to refraction and total internal reflection. When does total internal reflection occur?

Last Answer : When the angle of incidence becomes larger than the critical angle of incidence.

Fiber optics cable used in communication, works on the principle of (1) regular reflection of light (2) diffuse reflection of light (3) refraction of light (4) total internal reflection of light

Description : Fiber optics cable used in communication, works on the principle of (1) regular reflection of light (2) diffuse reflection of light (3) refraction of light (4) total internal reflection of light

Last Answer : total internal reflection of light

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 :  total internal reflection

A water tank appears shallower when it is viewed from top due to (1) rectilinear propagation of light (2) reflection (3) total internal reflection (4) refraction

Description : A water tank appears shallower when it is viewed from top due to (1) rectilinear propagation of light (2) reflection (3) total internal reflection (4) refraction

Last Answer : refraction

The sparkling of a diamond is due to (1) total internal reflection of light (2) interference of light (3) polarisation of light (4) refraction of light

Description : The sparkling of a diamond is due to (1) total internal reflection of light (2) interference of light (3) polarisation of light (4) refraction of light

Last Answer : total internal reflection of light

‘Mirage’ is an example of (1) refraction of light only (2) total internal, reflection of light only (3) refraction and total internal reflection of light (4) dispersion of light only

Description : ‘Mirage’ is an example of (1) refraction of light only (2) total internal, reflection of light only (3) refraction and total internal reflection of light (4) dispersion of light only

Last Answer : refraction and total internal reflection of light

What is the reason for twinkling of stars ? (1) Dispersion of light (2) Total internal reflection (3) Atmospheric reflection (4) Atmospheric refraction

Description : What is the reason for twinkling of stars ? (1) Dispersion of light (2) Total internal reflection (3) Atmospheric reflection (4) Atmospheric refraction

Last Answer : Atmospheric refraction

Diamonds are priced higher than water because : (1) they are sold by selected firms with monopolistic powers. (2) their marginal utility to buyers is higher than that of water. (3) their total utility to buyers is higher than that of water. (4) consumers do not buy them at lower prices.

Description : Diamonds are priced higher than water because : (1) they are sold by selected firms with monopolistic powers. (2) their marginal utility to buyers is higher than that of water. (3) their total utility to buyers is higher than that of water. (4) consumers do not buy them at lower prices.

Last Answer : (2) their marginal utility to buyers is higher than that of water. Explanation: The water diamond paradox or puzzle was a mystery of Adam Smith who observed that the price of diamonds was much higher ... is very high and so consumers are willing to pay higher prices for diamond, than for water.

Diamonds are priced higher than water because : (1) they are sold by selected firms with monopolistic powers. (2) their marginal utility to buyers is higher than that of water. (3) their total utility to buyers is higher than that of water. (4) consumers do not buy them at lower prices.

Description : Diamonds are priced higher than water because : (1) they are sold by selected firms with monopolistic powers. (2) their marginal utility to buyers is higher than that of water. (3) their total utility to buyers is higher than that of water. (4) consumers do not buy them at lower prices.

Last Answer :  their marginal utility to buyers is higher than that of water.

Light waves projected on oil surface show seven colours due to the phenomenon of (1) polarisation (2) refraction (3) reflection (4) interference

Description : Light waves projected on oil surface show seven colours due to the phenomenon of (1) polarisation (2) refraction (3) reflection (4) interference

Last Answer : (4) interference Explanation: In physics, interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.

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

Description : 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

Last Answer : a) refraction

A light ray traveling in benzene strikes the benzene-air surface at the critical angle. The angle of refraction of the light ray is: w) 30 degrees x) 60 degrees y) 90 degrees z) 180 degrees

Description : A light ray traveling in benzene strikes the benzene-air surface at the critical angle. The angle of refraction of the light ray is: w) 30 degrees x) 60 degrees y) 90 degrees z) 180 degrees

Last Answer : ANSWER: Y -- 90 DEGREES

4. If a light ray IM is incident on the surface AB as shown, identify the correct emergent ray. [Delhi (C)] -Chemistry-10

Description : 4. If a light ray IM is incident on the surface AB as shown, identify the correct emergent ray. [Delhi (C)] -Chemistry-10

Last Answer : Answer. Ray NQ, as it has to be parallel to ray OS.

A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes- (1) x/2 (2) x (3) 2x (4) x/4

Description : A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes- (1) x/2 (2) x (3) 2x (4) x/4

Last Answer : (2) x Explanation: When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.