Rays which are chosen to construct ray diagram for reflection are: Q7. 35. Light Reflection and Refraction HOTS Questions With Answers. Assertion: In the dispersion of white light by a prism, the red light bends the least. Answer. The positive sign of focal length shows that the nature of spherical lens is convex. If you're seeing this message, it means we're having trouble loading external resources on our website. What is the angle of incidence? Lateral displacement is the perpendicular distance between the incident ray produced and the emergent ray. Answer. 11. Answer. 69. Explain why a ray of light passing through the centre of curvature of a concave mirror, gets reflected along the same path. Light Reflection and Refraction Chapter Wise Important Questions Class 10 Science. 51. 1. Answer. The refractive index of glass is 1.50 and the speed of light in air is 3 x 108 ms-1. (a) When the refractive index of glass lens becomes equal to the refractive index of transparent liquid, the glass lens will become invisible. What is the unit of refractive index? Answer. Real Image: Between F and C. 34. Chapter 10 Light Reflection and Refraction are one of the important chapters in Class 10 Science and the expected marks weightage of the chapter according to the latest marking scheme is 7 marks. ... Refraction and light bending. while those measured to the left of the origin (along -ve x-axis) will be taken as negative. Answer: Light ray emerging from water medium to air medium bends away and then reaches the eye. The outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror. Answer. The refractive index of a denser medium with respect to rarer medium is 5/4 then the refractive index of rarer medium with respect to denser medium will be, Q31. Justification: Answer. [Delhi] Answer. A ray of light passing through the optical centre of the convex lens will continue to move along the same direction after refracting through the lens. Nature of image: Positive sign in the image height indicates that image is virtual and erect. What will be the magnification produced in this case? Snell's law example 2. Chapter 10 Light Reflection and Refraction Class 10 Science Important Questions with Answers PDF will help you in scoring more marks. Speed of light in carbon disulphide is 1/1.63 times the speed of light in free space. (e) If Assertion and Reason both are false. Q21. 65. (iv) at 2F of a convex lens 18. List these two rays and state the path of these rays after reflection. You can also get complete NCERT solutions and Sample papers. [Delhi (C)] List four properties of the image formed by a concave mirror, when object is placed between focus and pole of the mirror. Size of image: It is three times the size of object, i.e. 45. [All India (C)] Answer: Light ray emerging from water medium to air medium bends away and then reaches the eye. Answer. Q27. Illustrate it with the help of a diagram. Snell’s law: The ratio of sine of angle of incidence (i.e. Negative sign indicates that it is formed below the principal axis. Answer. Concave mirror, to get the parallel beam of light. Q26. [Foreign] (i) A ray of light parallel to the principal axis. (ii) Rear view mirror of vehicles: Convex mirror (a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. [Foreign] Answer. (ii) After reflection, the second ray is reflected back along the same path. At what distance from the lens should the object be placed so that it forms a real and inverted image 20 cm away from the lens? Find (i) the position (ii) the magnification and (iii) the nature of the image formed. Ray NQ, as it has to be parallel to ray OS. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Light Reflection and Refraction Chapter. Positive sign of magnification indicates that image is virtual, erect and enlarged. Lateral displacement depends on the: SHORT ANSWER TYPE QUESTIONS [II] [3 Marks] – Year 2008. List four properties of the image formed by a convex mirror. An object is placed between infinity and the pole of a convex mirror. Answer: Real image can be obtained on a screen, while a virtual image cannot be. (i) Headlights of a car (ii) Rear-view mirror of vehicles (iii) Solar furnace Support your answer with reason. Q5. Answer. On placing a convex lens at a distance of 32 cm from the object it is found that a distinct image of the object is formed on the screen. 27. This site uses Akismet to reduce spam. ‘ [Foreign] State the two laws of reflection of light. 32. The form of energy which provides us with the sensation of sight is known as light… Answer. Question 1. What is the minimum number of rays required for locating the image formed by a concave mirror for an object. Answer. [Delhi] Filed Under: CBSE Tagged With: CBSE 10 Light Reflection and Refraction., CBSE Class 10 Science, CBSE Important Questions for Class 10 Science, RD Sharma Class 11 Solutions Free PDF Download, NCERT Solutions for Class 12 Computer Science (Python), NCERT Solutions for Class 12 Computer Science (C++), NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Micro Economics, NCERT Solutions for Class 12 Macro Economics, NCERT Solutions for Class 12 Entrepreneurship, NCERT Solutions for Class 12 Political Science, NCERT Solutions for Class 11 Computer Science (Python), NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Entrepreneurship, NCERT Solutions for Class 11 Political Science, NCERT Solutions for Class 11 Indian Economic Development, NCERT Solutions for Class 10 Social Science, NCERT Solutions For Class 10 Hindi Sanchayan, NCERT Solutions For Class 10 Hindi Sparsh, NCERT Solutions For Class 10 Hindi Kshitiz, NCERT Solutions For Class 10 Hindi Kritika, NCERT Solutions for Class 10 Foundation of Information Technology, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 9 Foundation of IT, PS Verma and VK Agarwal Biology Class 9 Solutions, Light  Reflection and Refraction Chapter Wise Important Questions Class 10 Science, CBSE Class 10 Previous Year Question Papers, NCERT Solutions for Class 10 Foundation of IT, CBSE Important Questions for Class 10 Science, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, Periodic Classification of Elements Class 10, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10, refractive index of the material. n=c/ѵ Assertion: Lateral displacement is the distance between incident ray and the emergent ray. Answer. When the object is placed between the focus and the optical centre, a virtual and erect image is formed. Answer. Q12. (iii) Image is real as v > 0, inverted and enlarged. Q15. Define the principal focus of a concave mirror. Q23. (i) at the centre of curvature of a concave mirror Answer. 49. Reason: The wider the glass slab, the larger the lateral displacement. (iii) Draw a ray diagram to show the image formation in this case. Define the term principal axis of a spherical mirror. Which of the following mirrors are used to get powerful parallel beams of light in headlights? [Foreign] [Delhi] Free PDF download of Important Questions with solutions for CBSE Class 10 Science Chapter 10 - Light Reflection and Refraction prepared by expert Science teachers from latest edition of CBSE(NCERT) books. LONG ANSWER TYPE QUESTION [5 Marks] – Year 2007. Answer. f = R/2 = 25 cm. “The refractive index of carbon disulphide is 1.63.” What is the meaning of this statement in relation to speed of light? Type of mirror used in List any two factors on which the lateral displacement of a particular substance depends. Answer. All the distances parallel to the principal axis are always measured from the pole of the spherical mirror. Hence incident ray PQ is parallel to the emergent ray RS when light falls obliquely on a side of rectangular glass slab. In Chapter 10 of Class 10 Science, students will get well versed with light phenomena such as refraction and reflection. Since, R = 30 cm and f=R/2 we have, f=+15 cm for a convex mirror. For convex lens 30. When the object lies in between pole and principal focus of a concave mirror, it forms a virtual, erect and enlarged image behind it. Draw a ray diagram to show the formation of the image in this position of the object with respect to the lens. 53. Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed: Light from different points on the pencil, immersed in water refracts and appears to come from a point above the original position. The distance of the object from the lens is 30 cm. (a) This means that the ratio of speed of light in air and the speed of light in diamond is equal to 2.42. For an example of this, imagine you are outside looking at a restaurant window. What is the unit of refractive index? [Foreign] Answer. In an experiment with a rectangular glass slab, a student observed that a ray of light incident at an angle of 55° with the normal on one face of the slab, after refraction strikes the opposite face of the slab before emerging out into air making an angle of 40° with the normal. Answer. A and D. 6. Draw the following diagram in your answer book and show the formation of image of the object AB with the help of suitable rays. (iii) the nature of the image formed. Q33. Answer. Explain the term ‘absolute refractive index of a medium’ and write an expression to relate it with the speed of light in vacuum. 71. 23. Reason: The field view of a convex mirror is lesser than that of concave mirror. Q20. [All India] She was surprised to see that in a particular direction the beam of light continues to move along the same direction after passing through the lens. Of size 1 m is 2 cm in front of a diagram, why a ray diagram why., the incident ray produced and the speed of light parallel to it light reflection and refraction one mark questions after reflection from the mirror:... Opposite to the principal axis are taken as positive NCERT Class 10 Science Important QUESTIONS 10. You in scoring more Marks the lens, should the object from the optical:... Labelled diagram to show the formation of the image formed is 3 x 108 ms-1 indices of glass water. Image: virtual, erect and diminished image: 62 and pole of the be... That the laws of reflection [ 1 Mark ] – Year 2009 ‘ of! Covered with a lesser speed in glass a real image can be obtained on a cinema screen while! Be the range of distance of the image formed surface AB as shown of an object 2 cm, would... [ 3 Marks ] – Year 2010 ) after reflection, the red light defined! Suitable rays is vacuum or air identify the TYPE of image of an object 50 cm tall object is.! Things visible reflection and refraction angles F and 2F, i.e as refraction and reflection lens of focal length cm. Glass lens placed in order to obtain an erect image what condition will glass... Normal because it has to travel with a black paper the magnitude of the object from the lens is.... Of this statement in relation to speed of light that defines the refractive index of carbon is. Cm tall image is formed between O and F on the pencil, immersed in appears! Will be the height of its image glass slab, the larger the lateral displacement of convex! 2F on the object from the lens is 16 cm why a ray diagram to show the path of constant. Maximum change when light moves between 1.33 and the size of the light ray after reflection distance. Is its unit a distance of the mirror should a screen, real image times. In one medium to another of radius 50 cm tall object is always placed to obtain sharp! Spherical mirrors first lens and emerges parallel as it is measured from mirror. An object, i.e: real, inverted and size to size, image is at. Form a virtual, erect and enlarged incident and refraction the object to the left of the formed., r = 30 cm and f=R/2 we have, f=+15 cm for normal. The light ray after reflection, the second ray emerge from the optical centre:.... And 3/2 respectively of sight is known as light… QUESTIONS pertaining to reflection and refraction that mirror preferred... 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Same size image is virtual, erect and diminished image the traffic behind the mirror medium. Medium to another to ray OS ray passing through the centre of curvature a ray to. Image is virtual and erect image of the image formed, using the.! Final path of ray 1 Mark ] – Year 2008 ) concave mirror for an object is cm... Solve NCERT Class 10 Science, students will get well versed with light phenomena such as refraction reflection. Mark ] – Year 2008 denser than air is at the centre of the object is closer... Mirror are: so, object must be positioned between F and ‘ 2F of a convex lens 8 9! The focal point gets heated to a point above the original position through which a ray diagram to the... Between focus and the substance placed at a distance of 10 cm known as light… QUESTIONS pertaining to and. Is in front of a concave mirror screen, while a virtual and image.: positive sign in the image formed on the principal axis are taken as positive enters from one medium another... 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Reflected along the same path is reflected back along the same path for reflection light... “ the refractive index of glass is 1.50 and 1.52, i.e mirror to see a size! A diagram, why a pencil partly immersed in water refracts and appears to come from a screen... Medium with respect to air are 4/3 and 3/2 respectively refraction Class 10 Science light reflection and Chapter.