• (b) Name the phenomenon due to which a pencil partly immersed in water and held obliquely appears to be bent at the water surface. When a pencil is partly immersed in water and held in a slanting position, it appears to be bent at the boundary separating water and air. Why does the pencil appear to be bent?Figure CQ35.13. State whether the bending of pencil will increase or decrease if water is replaced by another liquid which is optically more dense than water. Reason: The apparent bending of the pencil is due to the refraction of light when it passes from water to air. When a pencil is partly immersed in water in a beaker and held in a slanting position, the immersed portion appears. Figure shows a straight stick AO whose lower portion BO is immersed in water. Performance & security by Cloudflare, Please complete the security check to access. Assertion (A): A stick is dipped in water in a slanting position. ← Prev Question Next Question →. This light ray changes medium and subsequently undergoes refraction. is there a diagram??? This is because refraction causes an apparent shift in the position of the part of the pencil within the water. asked Feb 24, 2019 in Physics by Aksat (69.3k points) (a) A stick partly immersed in water appears to be bent. This happens because the rays appear to come from P’ (which is the virtual image of the tip P of the stick) due to refraction from denser medium (water) to rarer medium (air) at the surface separating two media. The refraction causes an apparent shift in the position of the part of the pencil within the water. As a result, the image of the pencil appears to be broken. It appears to be displaced at the interface of air and water. Solution : (a) If we look into a tank of water… The refracted rays appear to come from point B'. Answer to: Consider a pencil partially immersed in a cup of water. The refraction causes an apparent shift in the position of the part of the pencil within the water. Light of course consists of photons traveling "at the speed of light" however there is a slight difference in the speed of light (the photons) as they travel through a vacuum (fastest), air (slightly slower) water (significantly slower) and a glass lens (perhaps slower still). Assertion: When a pencil is partly immersed in water and held obliquely to the surface, the pencil appears to bend at the water surface. 0 votes. Answer is B.The light reaching you from the portion of the pencil inside water seems to come from a different direction, compared to the part above water. Please enable Cookies and reload the page. A coin is placed at a depth of 15 cm in a beaker containing water. Light from different points on the pencil, immersed in water refracts and appears to come from a point above the original position. Explain why a pencil partly immersed in water, appears displace at the interface of the water?? Why is a pencil partially immersed in a cup of water appearing to be bent. The floor of a water tank appears at a depth of 2.5 m. If the refractive index of water is 1.33, find the actual depth of water. explain..why a pencil partly immersed in water appears to be bent at the water surface Somnath physics, Meritnation Expert added an answer, on 20/3/12 A pencil placed in water appears to be bent because of refraction of light. The pencil appears bent and slightly larger because it appears closer. MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. Why does the pencil appear to be bent?. Reason behind this is: A. Best answer A stick or a pencil half immersed in water at an angle appears bent due to refraction of light at the air-water surface. The bending of pencil will increase if water is replaced by a liquid which is much denser. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. If observed sideways the stick appears short and bent at the surface of water. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Share with your friends. Explanation of Solution. A pencil placed in water appears to be bent because of refraction of light. Explain with the help of a labelled ray diagram, why a pencil partly immersed in water appears to be bent at the water surface. Assertion: Zinc is used in the galvanization of iron Reason: Its coating on iron articles increasing the life of it by protecting it from rusting. As you sight at the portion of the pencil that is submerged in the water, light travels from water to air (or from water to glass to air). a) A stick partly immersed in water appears to be bent. 1.3k views. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Did you ever think why does it happen? Students can solve NCERT Class 10 Science Human Eye and Colourful World Multiple Choice Questions with Answers to know their preparation level. The refractive index of water is 4/3, calculate height through which the image of the coin is raised. The phenomenon that makes the pencil appear to be bent is called refraction. Have you seen a pencil partly immersed in water in a glass tumbler? Homework Statement You are looking at a pencil immersed at an angle in water. The light reaching out from the portion of the pencil inside water seems to come from a different direction, compared to the part above water due to refraction of light. Thus, cats and dogs are mammals, as are sheep, monkeys, rabbits and bears. Performance & security by Cloudflare, Please complete the security check to access. A pencil partly immersed in water in a glass tumbler, it appears to be displaced at the interface of air and water. Answer: Question 2. As light enters water at an angle, it bends away from its original path, and this makes the image look bent. A pencil part immersed in water looks bent due to refraction: the light waves from X change direction and so seem to originate at Y. Refraction occurs when light goes through a water surface since water has a refractive index of 1.33 and air has a refractive index of about 1. Similarly, when a pencil is partly immersed in water in a glass tumbler, it appears to be displaced from its original position at the surface. Reason: The apparent bending of the pencil is due to the refraction of light when it passes from water to air. You might have observed that a lemon kept in water in a glass tumbler appears to be bigger than its actual size, when viewed from the sides. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. As light travels from one medium to another, the light path will bend. Name the type of mirror used in the following situations: When light enters water, it cannot move as fast as it does in air. Cloudflare Ray ID: 6010e5752b2c3e46 Please enable Cookies and reload the page. Free PDF Download of CBSE Class 10 Science Chapter 11 Human Eye and Colourful World Multiple Choice Questions with Answers. The refraction causes an apparent shift in the position of the part of the pencil within the water. Thus, the immersed portion of pencil in water appears as CB'. Draw a ray diagram to show the bending of the stick. If water is replaced by another liquid which is optically more dense than water, then the bending of the pencil will increase. Assertion: When a pencil is partly immersed in water and held obliquely to the surface, the pencil appears to bend at the water surface. A stick partially immersed in water in a glass container appears bent or raised as shown in figure above. Share 0. Answer to Figure CQ35.13 shows a pencil partially immersed in a cup of water. A pencil looks bent in water because of a phenomenon called refraction. Answer to Figure CQ22.11 shows a pencil partially immersed in a cup of water. The pencil partially immersed in water appears bent because light is refracted as it travels across the boundary between water and air. Air and water are both substantially transparent meaning that light can pass through them with little or no change. Refraction in a water surface. You will find that the printed matter seems to be raised. Cloudflare Ray ID: 6010e5d70b45743d Consider a pencil AB, such that CB portion of the pencil is immersed in water as shown in figure. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. You may need to download version 2.0 now from the Chrome Web Store. • itsrhea is waiting for your help. Assertion: When a pencil is partly immersed in water and held obliquely to the surface, the pencil appears to bend at the water surface Looking from above, why does the pencil appear to be bent? Answer. ... , the statement is correct. Explain with the help of a diagram, why a pencil partly immersed in water appears to be bent at the water surface. Your IP: 104.238.98.12 Another way to prevent getting this page in the future is to use Privacy Pass. This makes the pencil appear to be displaced at the interface.It appears that when traveling obliquely from one medium to another, the direction of propagation of light in the second medium changes. Why can’t it appear to be at the normal position? Your IP: 157.230.3.153 If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Rays of light from the tip (B) of the pencil bend away from the normal as they go from water to air. It appears to be bent at point B in the direction BI. (a) With the help of a labelled diagram, explain why a tank full of water appears less deep than it actually is. However, does it appear to be shorter, longer or the same size when viewed at an angle from the opposite side? A pencil placed in water appears to be bent because of refraction of light. This is due to the refraction which occours when you see the part of pencil which is immersed in water it appears to be bent at the interface but actually the entire part of the pencil below water appears to be displaced due to refraction phenomenon 3.3K views View 3 Upvoters Sponsored by Raging Bull, LLC Place a pencil in a glass filled with water and what do you notice? Expert Answer: Incident rays from pencil travel from water to air, and they bend away from normal. NOT AN ARGUMENT (explanation) (c) A mammal is a vertebrate animal that nurses its offspring. A pencil partially immersed in water in a glass container appears bent as shown in the figure because the rays appear to come from A' due to refraction from denser medium (water) to rarer medium (air) at the surface separating two media. When a pencil is partly immersed in water, the pencil appears to bend at the surface. (1) 14. Give reason for your answer. This phenomenon is called refraction. Add your answer and earn points. When a pencil is placed in water, it appears to be bent because of the refraction of light. • Explain with the help of a diagram, why a pencil partly immersed in water appears to be bent at the water surface. 9. Asked by Topperlearning User | 26th Aug, 2014, 09:43: AM. 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