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Dear students,, This is Anurag Dhawal......!, You have been provided with the important questions of physics Write the answer to each of the following questions with reasons, Class 10 Science MCQs Chapter 10 Light Reflection and Refraction, Question 1. An object is placed at a distance of 0.25 m, in front of a plane mirror. The distance between the object and image will be, (a) 0.25 m, (b) 1.0 m, (c) 0.5 m, (d) 0.125 m, Answer/Explanation, MCQ On Light Class 10 Question 2. The angle of incidence for a ray of light having zero reflection angle is, (a) 0, (b) 30°, (c) 45°, (d) 90°, Answer/Explanation, MCQ Questions On Light Class 10 Question 3. For a real object, which of the following can produce a real image?, (a) Plane mirror, (b) Concave mirror, (c) Concave lens, (d) Convex mirror, Answer/Explanation, MCQ On Reflection Of Light Class 10 Question 4. Which of the following mirror is used by a dentist to examine a small cavity?, (a) Convex mirror, (b) Plane mirror, (c) Concave mirror, (d) Combination of convex and concave mirror, Answer/Explanation, MCQ On Reflection And Refraction Of Light With Answers Pdf Question 5. An object at a distance of 30 cm from a, concave mirror gets its image at the same point. The focal length of the mirror is, (a) – 30 cm, (b) 30 cm, (c) – 15 cm, (d) +15 cm, Answer/Explanation, Light Class 10 MCQ With Answers Question 6. An object at a distance of + 15 cm is slowly moved towards the pole of a convex mirror. The image will get, (a) shortened and real, (b) enlarged and real, (c) enlarge and virtual, (d) diminished and virtual, Answer/Explanation, MCQ Of Chapter Light Class 10 Question 7. A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by, (a) 15, (b) 20, (c) 30, (d) 0, Answer/Explanation, Reflection And Refraction Questions And Answers Question 8. A concave mirror of focal length 20 cm forms an image having twice the size of object. For the virtual position of object, the position of object will be at, (a) 25 cm, (b) 40 cm, (c) 10 cm, (d) At infinity, Answer/Explanation, Multiple Choice Questions On Light Reflection And Refraction Question 9. The image formed by concave mirror is real, inverted and of the same size as that of the object. The position of object should be, (a) at the focus, (b) at the centre of curvature, (c) between focus and centre of curvature, (d) beyond centre of curvature, Answer/Explanation, Multiple Choice Questions On Light Class 10 Question 10. The nature of the image formed by concave mirror when the object is placed between the focus (F) and centre of curvature (C) of the mirror observed by us is, (a) real, inverted and diminished, (b) virtual, erect and smaller in size, (c) real, inverted and enlarged, (d) virtual, upright and enlarged, Answer/Explanation, Light Chapter Physics Class 10 MCQ Question 11. The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be, (a) real, inverted and diminished in size, (b) real, inverted and enlarged in size, (c) virtual, upright and diminished in size, (d) virtual, upright and enlarged in size, Answer/Explanation, Reflection Of Light MCQ Pdf Question 12. If a man’s face is 25 cm in front of concave shaving mirror producing erect image 1.5 times the size of face, focal length of the mirror would be, (a) 75 cm, (b) 25 cm, (c) 15 cm, (d) 60 cm, Answer/Explanation, Multiple Choice Questions On Light Class 10 Question 13. As light travels from a rarer to a denser medium it will have, (a) increased velocity, (b) decreased velocity, (c) decreased wavelength, (d) both (b) and (c), Answer/Explanation, MCQ On Refraction Of Light Question 14. The angle of incidence i and refraction r are equal in a transparent slab when the value of i is, (a) 0°, (b) 45°, (c) 90°, (d) depend on the material of the slab, Answer/Explanation, Light Reflection And Refraction Class 10 Questions Question 15. The refractive index of transparent medium is greater than one because, (a) Speed of light in vacuum < speed of light in tansparent medium (b) Speed of light in vacuum > speed of light in tansparent medium, (c) Speed flight in vacuum = speed of light in tansparent medium, (d) Frequency of light wave changes when it moves from rarer to denser medium, Answer/Explanation, MCQs On Light Question 16. The refractive index of water is 1.33. The speed of light in water will be, (a) 1.33 × 108 m/s, (b) 3 × 108 m/s, (c) 2.26 × 108 m/s, (d) 2.66 × 108 m/s, Answer/Explanation, Light Multiple Choice Questions And Answers Question 17. You are given three media A, B and C of refractive index 1.33, 1.65 and 1.46. The medium in which the light will travel fastest is, (a) A, (b) B, (c) C, (d) equal in all three media, Answer/Explanation, MCQ Of Light Reflection And Refraction Class 10 Question 18. Light from the Sun falling on a convex lens will converge at a point called, (a) centre of curvature, (b) focus, (c) radius of curvature, (d) optical centre, Answer/Explanation, Light MCQ Class 10 Question 19. Large number of thin stripes of black paint are made on the surface of a convex lens of focal length 20 cm to catch the image of a white horse. The image will be, (a) a zebra of black stripes, (b) a horse of black stripes, (c) a horse of less brightness, (d) a zebra of less brightness, Answer/Explanation, Light Reflection And Refraction Class 10 Solutions Question 20. A divergent lens will produce, (a) always real image, (b) always virtual image, (c) both real and virtual image, (d) none of these, Answer/Explanation, MCQ Of Light Class 10 Question 21. When object moves closer to convex lens, the image formed by it shift, (a) away from the lens, (b) towards the lens, (c) first towards and then away from the lens, (d) first away and then towards the lens, Answer/Explanation, 22. When object moves closer to a concave lens the image by it shift, (a) away from the lens on the same side of object, (b) toward the lens, (c) away from the lens on the other side of lens, (d) first towards and then away from the lens, Answer/Explanation, 23. A magnified real image is formed by a convex lens when the object is at, (a) F, (b) between F and 2F, (c) 2F, (d) only (a) and (b) both, Answer/Explanation, 24. The distance between the potical centre and point of convergence is called focal length in which of the following cases?, Answer/Explanation, 25. A10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is [NCERT Exemplar Problems], (a) – 30 cm, (b) – 20 cm, (c) – 40 cm, (d) – 60 cm, Answer/Explanation, 26. Figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is [NCERT Exemplar Problems], Answer/Explanation, 27. A light ray enters from medium A to medium B as shown in figure. The refractive index of medium B relative to A will be [NCERT Exemplar Problems], , (a) greater than unity, (b) less than unity, (c) equal to unity, (d) zero, Answer/Explanation, 28. Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the figure. Which of the following could be inside the box? [NCERT Exemplar Problems], , (a) A rectangular glass slab, (b) A convex lens ., (c) A concave lens, (d) A prism, Answer/Explanation, 29. A beam of light is incident through the holes on side A and emerges out of the hole on the other face of the box as shown in the figure. Which of the following could be inside the box? [NCERT Exemplar Problems], (a) Concave lens, (b) Rectangular glass slab, (c) Prism, (d) Convex lens, Answer/Explanation, 30. Which of the following statements is/are true? [NCERT Exemplar Problems], (a) A convex lens has 4 dioptre power having a focal length 0.25 m, (b) A convex lens has -4 dioptre power having a focal length 0.25 m, (c) A concave lens has 4 dioptre power having a focal length 0.25 m, (d) A concave lens has – 4 dioptre having a focal 0.25 m, Answer/Explanation, 31. Magnification produced by a rear view mirror fitted in vehicles [NCERT Exemplar Problems], (a) is less than one, (b) is more than one, (c) is equal to one, (d) can be more than or less than one depending upon the position of the object in front of it., Answer/Explanation, 32. A full length image of a distant tall building can definitely be seen by using [NCERT Exemplar Problems], (a) a concave mirror, (b) a convex mirror, (c) a plane mirror, (d) both concave as well as plane mirror, Answer/Explanation, 33. In torches, search lights and headlights of vehicles the bulb is placed [NCERT Exemplar Problems], (a) between the pole and the focus of the reflector, (b) very near to the focus of the reflector, (c) between the focus and centre of curvature of the reflector, (d) at the centre of curvature of the reflector, Answer/Explanation, 34. The laws of reflection hold good for [NCERT Exemplar Problems], (a) plane mirror only, (b) concave mirror only, (c) convex mirror only, (d) all mirrors irrespective of their shape, Answer/Explanation, 35. The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in figure. Which one of them is correct? [NCERT Exemplar Problems], , (a) A, (b) B, (c) C, (d) D, Answer/Explanation, 36. In which of the following, the image of an object placed at infinity will be highly diminished and point sized? [NCERT Exemplar Problems], (a) Concave mirror only, (b) Convex mirror only, (c) Convex lens only, (d) Concave mirror, convex mirror, concave lens and convex lens., Answer/Explanation, 37. When light falls on a smooth polished surface, most of it, (a) is reflected in the same direction, (b) is reflected in different directions, (c) is scattered, (d) is refracted into the second medium, Answer, 38. Image formed by reflection from a plane mirror is, (a) real and inverted, (b) virtual and erect, (c) real and erect, (d) virtual and inverted, Answer, 39. If an incident ray passes through the focus, the reflected ray will, (a) pass through the pole, (b) be parallel to the principal axis, (c) retrace its path, (d) pass through the centre of curvature, Answer, 40. Magnifying power of a concave lens is, (a) always > 1, (b) always < 1, (c) always = 1, (d) can have any value, Answer, 41. The image formed by a convex lens can be, (a) virtual and magnified, (b) virtual and diminished, (c) virtual and of same size, (d) virtual image is not formed, Answer, 42. A point object is placed at a distance of 20 cm from a convex mirror of focal length 20 cm. The image will form at:, (a) at infinity, (b) at focus, (c) at the pole, (d) behind the mirror, Answer, 43. Focal length of a concave mirror is, (a) negative, (b) positive, (c) depends on the position of object, (d) depends on the position of image, Answer, 44. If the power of a lens is – 2 D, what is its focal length?, (a) +50 cm, (b) -100 cm, (c) -50 cm, (d) +100 cm, Answer, 45. A spherical mirror and a spherical lens each have a focal length of -10 cm. The mirror and the lens are likely to be, (a) both concave, (b) both convex, (c) the mirror is concave and the lens is convex, (d) the mirror is convex and the lens is concave, Answer, 46. If the magnification produced by a lens has a negative value, the image will be, (a) virtual and inverted, (b) virtual and erect, (c) real and erect, (d) real and inverted, Answer, 47. When the object is placed between f and 2f of a convex lens, the image formed is, (a) at f, (b) at 2f, (c) beyond 2f, (d) between O and f, Answer, 48. Which mirroji can produce a virtual, erect and magnified ifhage of an object?, (a) Concave mirror, (b) Convex mirror, (c) Plane mirror, (d) Both concave and convex mirrors, Answer, 49. If the image is formed in front of the mirror, then the image distance will be, (a) positive or negative depending on the size of the object, (b) neither positive nor negative, (c) positive, (d) negative, Answer, 50. A ray of light is travelling from a rarer medium to a denser medium. While entering the denser medium at the point of incidence, it, (a) goes straight into the second medium, (b) bends towards the normal, (c) bends away from the normal, (d) does not enter at all, Answer, 51. A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labelling indicated in figure:, , (a) I, (b) II, (c) III, (d) IV, Answer, Direction (Q52 to Q56): The questions given below consist of an assertion and the reason. Use the following key to choose the appropriate answer., (a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion., (b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion., (c) Assertion is true but the Reason is false., (d) The statement of the Assertion is false but the Reason is true., 52. Assertion: Incident light is reflected in only one direction from a smooth surface., Reason: Since the angle of incidence and the angle of reflection are same, a beam of parallel rays of light falling on a smooth surface is reflected as a beam of parallel light rays in one direction only., Answer/Explanation, 53. Assertion: The word AMBULANCE on the hospital vans is written in the form of its mirror as, Reason: The image formed in a plane mirror is same size of the oblect., Answer/Explanation, 54. Assertion: Cannot see the distant object clearly., Reason: The far point of an eye suffering j, from myopia is less than infinity., Answer/Explanation, 55. Assertion: Pupil is black in colour., Reason: Pupil is black in colour as no light is reflected in it., Answer/Explanation, 56. Assertion: The rainbow is a man made spectrum of sunlight in the sky., Reason: The rainbow is formed in the sky when the sun is shining and it is raining at the same time., Answer/Explanation, 57. ____________ mirror is used as a security mirror in shops and on roads at sharp bends and concealed entrances., Answer/Explanation, 58. The refractive index of a transparent medium is the ratio of the speed of light in ____________ to that in the ____________ ., Answer/Explanation, 59. If the magnification has a minus sign, then the image is ____________ and ____________ ., Answer/Explanation, 60. The focal length of a lens is the distance between ____________ and ____________ of the lens., Answer/Explanation, 61. The focal length of a concave lens is considered to be ____________ ., Answer/Explanation, 62. In order to calculate the power of a lens, we need its focal length in ____________ ., Answer/Explanation, 63. Angle of refraction cannot exceed 90°. [True/False], Answer/Explanation, 64. When incident angle i satisfies n = \(\frac{1}{\sin i}\), the refracted light will pass along the surface. [True/False], Answer/Explanation, 65. A person standing in front of a mirror finds his image larger than himself. This shows that mirror is convex in nature. [True/False], Answer/Explanation, 66. Lateral displacement increases with the thickness of the given slab. [True/False], Answer/Explanation, 67. Lateral displacement is directly proportional to thickness of the glass slab. [True/False], Answer/Explanation, 68. Nature of image formed by mirror gives an ideal about nature of mirror. [True/False], Answer/Explanation, 69. A convex lens (ng = 3/2) when placed in water (nw = 4/3) has increased focal length [True/False], Answer/Explanation, 70. A convex and a concave lens of equal focal length behaves as a regular glass slab receiving light normally. [True/False], Answer/Explanation, 71. Concave lens and convex mirror diverge the rays which fall parallel to the principal axis. [True/False], Answer/Explanation, 72. The power of a concave lens is positive. [True/False], Answer/Explanation, Direction: Match Column I with Column II., 73., Answer/Explanation, 74. What is light?, Answer/Explanation, 75. Write any one observation from everyday life which show us that light travels in a straight line., Answer/Explanation, 76. What is a ray?, Answer/Explanation, 77. What is beam?, Answer/Explanation, 78. Explain why a ray of light passing through the centre of curvature of a concave mirror, gets reflected along the same path., Answer/Explanation, 79. Is light a ray or a wave?, Answer/Explanation, 80. What are the characters associated with light as a wave?, Answer/Explanation, 81. What is Spherical mirror?, Answer/Explanation, 82. What is the relation connecting focal length and radius of a spherical mirror?, Answer/Explanation, 83. Can any spherical surface act as a reflector?, Answer/Explanation, 84. Redraw the diagram given below in your answer book and show the direction of the light ray after reflection from the mirror., Answer/Explanation, 85. For what position of object, a concave mirror forms a real image equal to size of object?, Answer/Explanation, 86. A concave mirror forms a sharp image of a distant tree. What name is given to the distance between the concave mirror and screen on which sharp image is formed?, Answer/Explanation, 87. In what condition, the image formed by a concave mirror is virtual?, Answer/Explanation, 88. Specified the size of image formed by a concave mirror when m > 1., Answer/Explanation, 89. Name the mirror that can be used to check theft in shops., Answer/Explanation, 90. What is the position of the object placed on the side of reflecting surface of a concave mirror of focal length 15 cm if the image is formed at the distance of 30 cm from the mirror?, Answer/Explanation, 91. Which mirror, concave or convex always converges the light rays?, Answer/Explanation, 92. For what position of the object does a concave mirror forms a real image which is highly enlarged?, Answer/Explanation, 93. When object is placed at centre of centre of curvature of concave mirror, where is the image formed?, Answer/Explanation, 94. What focal length can be assigned to a plane mirror?, Answer/Explanation, 95. Size of the image formed on a concave mirror is highly diminished, state the position of object and image., Answer/Explanation, Fill in the Blanks, Light shows the phenomena of reflection, refraction and ………. ., 2. The speed of light in vacuum is ………. ., 3. Power of’ a lens is the ………. of its focal length., 4. The SI unit of power is ………. ., 5. A ………. lens will always give a virtual, erect and diminished image, irrespective of the position of the object., 6. A positive sign in the value of magnification indicates that the image is ………. ., 7. A ………. mirror is used as a head mirror by the doctors to concentrate light on the body parts to be examined., 8. No matter how far you stand from a spherical mirror, your image appears erect. The mirror may be ………. ., ***************************************************************