Due to atmospheric refraction of sunlight, the time from sunrise to sunset is lengthened by about: (a) 6 minutes (b) 2 minutes (c) 4 minutes (d) 5 minutes Answer: (c) 4 . The twinkling of stars is a similar phenomenon. Which of the following phenomena is not the result of ... The refraction of light caused by the earth's atmosphere having air layers of varying optical density is called atmospheric refraction. definition Twinkling of Stars In reality stars do not twinkle but it appears to twinkle when seen from the surface of the Earth. Each atmospheric region distorts the light slightly for a fraction of a second. Atmospheric Refraction: The refraction by different layers of the atmosphere is called atmospheric refraction. Twinkling of stars is due to atmospheric refraction. Answer. Planets, on the other hand, appear bigger than stars as they are closer to the earth. Twinkling of Star: It is also due to atmospheric refraction. In the given statement it is mentioned that reflection of light is the reason behind the twinkling of the stars. Since stars are very far off heavenly bodies and therefore are considered single point sources of light. As the beam of starlight keeps deviating from its path, the apparent position of star keeps on changing because physical condition of earth's atmosphere is not stationary. What is atmospheric refraction ? Use this phenomenon to ... (b) refraction of light by different layers of varying refractive indices. Atmospheric Refraction | Human Eye and Colourful World ... The atmospheric refraction occurs in a medium of gradually. 1. askedApr 20, 2020in Physicsby Mukesh01(47.6kpoints) Twinkling of stars is due to atmospheric (a) dispersion of light by water droplets (b) refraction of light by different layers of varying refractive indices (c) scattering of light by dust particles (d) internal reflection of light by clouds the human eye and the colourful world class-10 The bluish colour of water in deep sea is due to Twinkling of Stars The twinkling of stars is also due to atmospheric refraction. The starlight, on entering the earth's atmosphere, undergoes refraction continuously before it reaches the earth. Assertion: The twinkling of stars is due to reflection of light. Class 10 Science Chapter 11 MCQ - Tiwari Academy refraction of light. Atmospheric Refraction & phenomena of Atmospheric ... Since upper layer (hotter) has a lesser refractive index than the lower one (cooler), starlight bends towards the . The twinkling of stars is due to atmospheric refraction of the starlight the starlight on entering the earth atmosphere undergoes the refraction continuously before it reaches the earth atmospheric refraction occur in the medium of gradually changing refractive index.Since the atmosphere bends starlight towards the normal the apparent position of the star is slightly different from the actual . The star twinkling in the night because of the effect of our atmosphere. The twinkling of stars is due to the atmospheric refraction of star's light. An inter. Explanation [B] Refraction of light by different layers of varying refractive indices. As we know that, due to refraction of light by different layers of varying refractive indices, the apparent position of source of light keeps on changing where our atmosphere play a vital role. 1. The stars only twinkle due to our atmosphere and we know this because if you look at the stars from outside our atmosphere like the astronauts on the space station, they don't see the stars twinkling at all. Download Solution PDF Due to the varying optical densities of air, starlight is refracted multiple times through the atmosphere before it reaches . A star appears twinkling in the sky because of (1) scattering of light by atmosphere (2) reflection of light by atmosphere (3) refraction of light by atmosphere (4) diffraction of light by atmosphere Last Answer : refraction of light by atmosphere Show Answer As the beam of starlight keeps deviating from its path, the apparent position of star keeps on changing because physical condition of earth's atmosphere is not stationary. The twinkling of Star: It is also due to atmospheric refraction. Therefore, due to the continuously changing atmosphere, the light coming from a point-sized star suffers variations due to which the star appears to be twinkling. Apparent position of the Star. ∙ The atmospheric refraction occurs in a medium of gradually changing refractive index. When the light coming from a star enters the earth's atmosphere, it undergoes refraction due to the varying optical densities of air The stars twinkle in the night . Twinkling of Stars The twinkling of a star is due to atmospheric refraction of starlight. Twinkling of stars is due to atmospheric (1) dispersion of light by water droplets (2) refraction of light by different layers of varying refractive indices (3) scattering of light by dust particles (4) internal reflection of light by clouds Advanced sunrise and delayed sunset. Yes, pollution in atmosphere affects the formation of rainbow and twinkling of stars. The starlight, on entering the earth's atmosphere, undergoes refraction continuously before it reaches the earth. Twinkling of stars is due to atmospheric (a) dispersion of light by water droplets (b) refraction of light by different layers of varying refractive indices (c) scattering of light by dust particles (d) internal reflection of light by clouds. Can you explain this answer? The twinkling of a star is due to the atmospheric refraction of star's light. The optical phenomena, twinkling of stars, is due to. Twinkling of stars is due to atmospheric (a) Dispersion of light by water droplets (b) Refraction of light by different layers of varying refractive indices (c) Scattering of light by dust particles (d) Internal reflection of light by clouds Ans- (b) Refraction of light by different layers of varying refractive indices 9. Planets are closer to the earth than stars. C. Both A & B. D. Tide Waves. Twinkling, also called scintillation, is a generic term for variations in apparent brightness, colour, or position of a distant luminous object viewed through a medium. The change in optical density of air due to the different atmospheric layer causes twinkling of stars. Twinkling of Stars. When the light coming from a star enters the earth's atmosphere, it undergoes refraction due to the varying optical densities of layers of air. Solution Show Solution. In simple terms, twinkling of stars is caused by the passing of light through different layers. Explanation: Different layers of atmospheric air with different density are found in the atmosphere. The apparent flickering of objects placed behind a hot object or fire. When a light enters the earth and hits the . EXPLANATION: Different layers of atmospheric air with different density are found in the atmosphere. Twinkling of stars is due to atmospheric refraction. The twinkling of stars is due to the atmospheric refraction of star light and due to the changing in the position of the stars and the movement of the layers of the atmosphere. The twinkling of stars is due to the atmospheric refraction of star's light. The starlight, on entering the earth's atmosphere, undergoes refraction continuously before it reaches the earth. The atmospheric refraction occurs in a medium of gradually. These act as prisms and lenses, making the light brighter or dimmer to the human eye. Please scroll down to see the correct answer and solution guide. Why Do Stars Twinkle? When light from stars enters the earth's atmosphere, it continuously goes from rarer to a denser medium, therefore, refraction of light takes place. Due to this reason, a planet is considered to be made up of a number of point sources of light. Last updated at Nov. 15, 2021 by Teachoo Twinkling of stars is due to atmospheric (a) dispersion of light by water droplets (b) refraction of light by different layers of varying refractive indices (c) scattering of light by dust particles (d) internal reflection of light by clouds Answer (a) Twinkling of stars: Twinkling of stars is due to atmospheric refraction of star light. The starlight, on entering the earth's atmosphere, undergoes refraction continuously before it reaches the earth.This makes continuously change in star's position and we see the twinkling of stars. Atmospheric refraction is the refraction of light while passing from one air layer to another air layer of different optical densities (or refractive indices). Twinkling of stars—called "scintillation" by astronomers—is caused by moving air currents in the atmosphere. when starling enters our atmosphere it is affected by winds in . Answer : (c) 4 minutes. Stars do not really twinkle they just appear to twinkle when seen from the surface of the earth. from Rarer to denser medium. Atmospheric refraction of starlight is responsible for the twinkling of stars. The refraction of light occurs in a medium of various layers of gradually changing refractive indices. When the light coming from a star enters the earth's atmosphere, it undergoes refraction due to the varying optical densities of air at various altitudes. These layers have different densities and temperatures. The twinkling of stars occurs due to atmospheric refraction of star's light. The physical conditions of the atmosphere are not same, the apparent position of the object through hot air fluctuates. So the light from the stars is sometimes brighter and sometimes fainter and it appears to twinkle. it is is a phenomenon of atmospheric refraction. This refraction of light that takes place in the atmosphere is known as atmospheric refraction. A. Refraction B. If the object lies outside the Earth's atmosphere, as in the case of stars and planets, the phenomenon is termed astronomical scintillation; for objects within the atmosphere, the phenomenon is termed terrestrial scintillation. Due to atmospheric refraction, when some so the point sources look brighter, others appear dimmer. Hence, the star light reaching our eyes change continuously and stars appear to twinkle. The speed of star-light reaching our eyes increases and decreases continuously as it travels from one medium to another while passing through the atmosphere. When the starlight enters the earth's atmosphere it undergoes refraction continuously, due to changing refractive index i.e. As the layers of air are not stable so the stars are in different positions at different timelines, that is, the stars appear to be twinkling. (i) Due to atmospheric refraction, apparent length of the day (a) increases (b) decreases (c) remains the same (d) all of these The light rays coming from a star reaches our eyes after passing through the atmosphere having different air layers of different optical densities. When starlight enters the atmosphere, it is affected by winds in the atmosphere and areas with different temperatures and densities. When the light coming from a star enters the earth's atmosphere, it undergoes refraction due to the varying optical densities of air. (1) Sun appearing red at sunset (2) Twinkling of stars at night (3) Sun appearing higher in the sky than it actually is (4) Sun becoming visible two or three minutes before actual sunrise Last Answer : Sun appearing higher in the sky than it actually is Show Answer 1 9) Assertion (A): The twinkling of stars is due to the fact that refractive index of the earth's atmosphere fluctuates. (a) dispersion of light by water droplets. Twinkling of stars is due to atmospheric refraction of star light. The Optical Density of Air varies continuously in the different layers of the atmosphere. ∙ The starlight, on entering the earth's atmosphere, undergoes refraction continuously before it reaches the earth. Answer (1 of 4): The question seems to be, ill-written about refraction of light. So let's say we're standing over here on Earth, looking at this star. The atmospheric refraction occurs in a medium of gradually changing refractive index. Due to atmospheric refraction, the sun is a) reflection of light from star b) atmospheric refraction c) scattering of light. We know that when light travels from star to earth it travels through the atmosphere of the earth but due to different temperature and densities compare to space when . The twinkling of stars is due to the atmospheric refraction of star's light. changing refractive index. Complete step-by-step answer: The twinkling of stars is due to atmospheric refraction of star-light. Twinkling of stars is due to atmospheric refraction. The air in the earth's atmosphere is such that it has increasing refractive index When starlight enters earth's atmosphere it undergoes multiple refraction continuously before it reaches the earth So let's explore how this atmosphere makes all the stars twinkle at us. Atmospheric refraction is responsible for the twinkling of stars. To solve this type of question we must first know the basic concept of the twinkling of stars and then will see the options. Most scintillation effects are caused by anomalous atmospheric refraction caused by small-scale fluctuations in air density usually related to temperature . Distant star act like a point source of light. Question 19: Twinkling of stars is due to atmospheric [NCERT Exemplar Problems] (a) dispersion of light by water droplets (b) refraction of light by different layers of varying refractive indices (c) scattering of light by dust particles (d) internal reflection of light by clouds. The continuously changing atmosphere refracts the light from the stars by different amounts from one moment to . The Questions and Answers of The optical phenomena, twinkling of stars, is due toa)Atmospheric reflectionb)Total reflectionc)Atmospheric refractiond)Total refractionCorrect answer is option 'C'. Twinkling of stars is due to atmospheric :dispersion of light by water droplets, refraction of light by different layers of varying refractive indices, scattering of light by dust particles, internal reflection of light by clouds. Twinkling of stars :-. (c) interference of light (d) refraction of light. The beam of light from a star passes through many regions of moving air while on its way to an observer's eye or telescope. (d) internal reflection of light by clouds. While passing through the atmosphere consisting of layers of different refractive index, the light from star undergoes refraction continuously. Which of the following is not caused by atmospheric refraction of light ? The twinkling of stars occurs due to atmospheric refraction of star's light. Explanation: b) due to changes in refractive indices of atmospheric layer, light emitted by stars sometimes bends towards normal or sometimes bends away from normal, which changes position of star, and appears to be twinkle. Since stars are very far away heavenly bodies and therefore are considered single point sources of light. The correct answer is large distance of stars and fluctuations in the density of air. When the light coming from a star enters the earth's atmosphere, It undergoes refraction due to the varying optical densities of air at various altitudes. The twinkling of stars is due to atmospheric a reflecti. This is known as atmospheric refraction. Stars t winkle in night sky due to atmospheric refraction. The atmospheric refraction occurs in a medium of gradually changing refractive index. The twinkling of star is due to atmospheric refraction. The continuously changing atmosphere refracts the light from the stars by different amounts from one moment to the next. But the optical densities of different layers of air keep on changing continuously due to change in temperature conditions. | The twinkling of stars is due to atmospheric : (a) reflection of light (b) dispersion of light. Twinkling of stars is due to atmospheric (a) dispersion of light by water droplets (b) refraction of light by different layers of varying refractive indices (c) scattering of light by dust particles (d) internal reflection of light by clouds. The atmospheric refraction of light causes the twinkling of: (a) planets only (b) stars only (c) planets and stars (d) stars and satellites Answer: (b) stars only. Answer . Twinkling of stars take place due to atmospheric refraction. The twinkling of a star is due to atmospheric refraction of starlight. are solved by group of students and teacher of Class 7, which is also the largest student community of Class 7. The splitting of white light into different colours on passing through a prism is called (a) reflection (b) refraction (c) dispersion (d) deviation Why do stars twinkle class10? Twinkling of stars is due to atmospheric refraction of starlight. Since the stars are very distant, they approximate point-sized sources of . It bends towards the normal successively, hence the amount of light enters our eyes fluctuates sometime bright and sometime faint. Twinkling of stars is due to atmospheric (a) Refraction of light by different layers of varying refracting indices (b) Dispersion of light by water droplets (c) internal reflection of light by clouds (d) Scattering of light by dust particles Show Answer 3. The light coming from the star has to pass through the atmosphere having air layers of different optical densities due to which its apparent position changes at a fast rate and it gives twinkling effect. This leads to the twinkling of the stars. ️ Watch Full Free Course:- https://www.magnetbrains.com ️ Get Notes Here: https://www.pabbly.com/out/magnet-brains ️ Get All Subjects . Answer (1 of 6): Because of wind and other motion of the air in the atmosphere, the density of air is not constant but forms small blobs of low and high density. (c) scattering of light by dust particles. The physical conditions of the atmosphere are not same, the apparent position of the object through hot air fluctuates. Apparent flattering of sun's disc. The atmosphere keeps changing continuously due to which light from the stars gets refracted by different amounts from one . Fig. Distant star acts like a point source of light. The twinkling of a star is due to atmospheric refraction of starlight. Since stars are very far away heavenly bodies and therefore are considered single point sources of light. The starlight, on entering the earth's atmosphere, undergoes refraction continuously before it reaches the earth. The atmospheric refraction is due to change in the refractive index at different level in atmosphere. Stars near the horizon appear slightly higher than their actual position. Hence the amount of light enters our eyes fluctuate some . (a) Twinkling of stars: Twinkling of stars is due to atmospheric refraction of star light. 1. The change in intensity of light coming from the stars is called twinkling of stars. Due to the atmospheric refractions, the star appears to twinkle at . The twinkling of a star is due to the atmospheric refraction of the star's light. Concept. Distant star act like a point source of light. 21. The twinkling of a star is due to atmospheric refraction of starlight. Answer: (b) refraction of light by different layers of varying refractive indices The twinkling of stars is a similar phenomenon. Advertisement Remove all ads. Added an answer on December 1, 2021 at 11:10 am. So, stars appear to Twinkle. Twinkling of stars is occurred due to which phenomenon? 2. Suggest corrections 1 Upvotes Twinkling of stars is due to atmospheric. Answer. It suggest to me that you might want to ask about why the moon do not appear twinkling as the stars do The answer is simpler, The moon don't produce or emit its own light. Question 5: The atmospheric refraction of light causes the twinkling of: (a) planets only (b) stars only (c) planets and stars (d) stars and satellites. Reflection of light; Dispersion of light; Interference of light; Refraction of light; Answer: D (Refraction of light) Question 15: Due to . 8. Twinkling of stars is due to (a) reflection of light by clouds (b) scattering of light by dust particles (c) dispersion of light by water drops (d) atmospheric refraction of starlight Answer Question 7. 2020-2021 cbse chapter 10 class 10 class 10 science light - reflection and refraction ncert science. On the other hand, due to the constantly changing atmosphere, the light coming from the larger planet is not able to change (since they are very close to the earth) due to which the . Key Points. The light falling on the moon from the su. They change several times every second. The formation of rainbow is due to dispersion, refraction and internal reflection. When the light coming from the star enters the earth's atmosphere, it gets refracted (bent), due to varying optical densities of air at various altitudes. When light is carried by the stars, it is constantly refracting in different layers. When light is carried by the stars, it is constantly refracting in different layers. On account of atmospheric refraction, stars seen appear higher than they actual are; advanced sunrise; delayed sunset, oval appearance of the sun at sunrise and sunset; stars twinkle, planets do not. The twinkling of stars is due to atmospheric refraction of light. This is known as atmospheric refraction. T he twinkling of stars is caused by the passing of light through different layers of a turbulent atmosphere. As the layers of air are not stable so the stars are in different positions at different timelines, that is, the stars appear to be twinkling. Atmospheric refraction the apparent angular elevation of the heavenly bodies above their true places, caused by the refraction of the rays of light in their . Twinkling of stars. The physical conditions of the atmosphere are not same, the apparent position of the object through hot air fluctuates. The stars seem to twinkle in the night sky due to the effects of the Earth's atmosphere. The twinkling of stars is due to atmospheric: (a) reflection of light (b) dispersion of light (c) interference of light (d) refraction of light. ∙ The twinkling of a star is due to atmospheric refraction of starlight. Due to the atmospheric refraction of sunlight, the time from sunrise to sunset is lengthened by about: (a) 6 minutes (b) 2 minutes (c) 4 minutes (d) 5 minutes. 3. Question 26. The twinkling of a star is due to atmospheric refraction of starlight. changing refractive index. This is known as atmospheric refraction. Total Internal Reflection. The starlight, on entering the earth's atmosphere, undergoes refraction continuously before it reaches the earth. Reason (R): In cold countries, the phenomenon of looming (i.e ship appears in the sky) takes place, because refractive index of air decreases with height 1 10) Assertion: The colour of the scattered light does not depend . 1. Question 3. The apparent positions of a star appears slightly higher than its actual position. Twinkling of stars is due to atmospheric (a) dispersion of light by water droplets (b) refraction of light by different layers of varying refractive indices (c) scattering of light by dust particles (d) internal reflection of light by clouds Soln: A Star always emits light but the different layers of refractive indices in our atmosphere allows it to seem like a twinkle. The star light after entering the earth's atmosphere undergoes refraction in a continuous manner before it reaches the Earth. Vinay's father cannot read a book placed 25 cm from his eye. Twinkling of stars The twinkling of a star is due to atmospheric refraction of starlight. Hence, the amount of light enters our eyes fluctuate sometimes . (a) Twinkling of stars: Twinkling of stars is due to atmospheric refraction of star light. 19. The atmospheric refraction occurs in a medium of gradually changing refractive index. Twinkling of stars is due to atmospheric [NCERT Exemplar Problems] (a) dispersion of light by water droplets (b) refraction of light by different layers of varying refractive indices (c) scattering of light by dust particles (d) internal reflection of light by clouds. The twinkling of stars is due to the atmospheric refraction of star's light. This causes the light from the star to twinkle when seen from the ground. The stars are far off but the planets are nearer to the earth; Answer: D ( The stars are far off but the planets are nearer to the earth ) Question 14: The twinkling of stars is due to atmospheric. 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