This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Science > Light Reflection And Refraction > Class 10 Science Chapter 10 Light Reflection And Refraction – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 10 Light Reflection And Refraction Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The magnification of an object placed 10 cm from a convex mirror of radius of curvature 20 cm will be- A) ( C) 1. B) (A) 0.2. C) (D) infinity. D) (B) 0.5. Show Answer Correct Answer: D) (B) 0.5. 2. Image formed by plane mirror is A) Real and erect. B) Real and inverted. C) Virtual and erect. D) Virtual and inverted. Show Answer Correct Answer: C) Virtual and erect. 3. The image formed by a concave mirror is observed to be virtual, erect and larger than the object. then the position of the object should be- A) Between the focus and the centre of curvature. B) At the centre of curvature. C) Beyond the centre of curvature. D) Between the pole of the mirror and the focus. Show Answer Correct Answer: D) Between the pole of the mirror and the focus. 4. Whatever be the position of the object, the image formed by a mirror is virtual, erect and smaller than the object. The mirror then must be:(a) plane (b) concave (c) convex (d) either concave or convex A) B. B) C. C) A. D) D. Show Answer Correct Answer: B) C. 5. Which of the following best models how light is reflected? A) An arrow hitting a target. B) A ball bouncing off a wall. C) An apple falling from a tree. D) A marble rolling down a ramp. Show Answer Correct Answer: B) A ball bouncing off a wall. 6. When does the light is refracted? A) When light cannot pass through an opaque object. B) When light travels in a straight line. C) When light is bounced. D) When light travels in two different mediums. Show Answer Correct Answer: D) When light travels in two different mediums. 7. Light travels through a liquid at 2.25 x 10$^{8}$ m/s. What is the absolute refractive index of the liquid? A) 2.45. B) 1.33. C) 1.0. D) 1.523. Show Answer Correct Answer: B) 1.33. 8. Linear magnification produced by a concave mirror may be:(a) less than 1 or equal to 1 (b) more than 1 or equal to 1 (c) less than 1, more than 1 or equal to 1 (d) less than 1 or more than 1 A) C. B) D. C) B. D) A. Show Answer Correct Answer: A) C. 9. In optics an object which has higher refractive index is called A) Optically rarer. B) Optically denser. C) Optical density. D) Refractive index. Show Answer Correct Answer: B) Optically denser. 10. Density is ..... A) The amount of space an object takes up. B) The amount of mass in an object. C) The weight of an object. D) The amount of mass in a given space. Show Answer Correct Answer: D) The amount of mass in a given space. 11. When a ray of light travelling in glass enters into water obliquely:(a) it is refracted towards the normal (b) it is not refracted at all (c) it goes along the normal (d) it is refracted away from the normal A) B. B) D. C) C. D) A. Show Answer Correct Answer: B) D. 12. Assertion:The twinkling of star is due to reflection of light. Reason:The velocity of light changes while going from one medium to the other. A) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. B) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C) Assertion is true but Reason is false. D) Both Assertion and Reason are false. Show Answer Correct Answer: A) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. 13. You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most A) Water. B) Glycerine. C) Mustard. D) Kerosene. Show Answer Correct Answer: B) Glycerine. 14. Explain why a pencil appears bent when placed in a glass of water. A) The pencil appears bent in water due to the refraction of light at the air-water interface. B) The pencil appears bent due to gravitational forces in the water. C) The pencil appears bent because of the temperature difference between the water and air. D) The pencil appears bent because of the magnetic properties of the water. Show Answer Correct Answer: A) The pencil appears bent in water due to the refraction of light at the air-water interface. 15. Magnification produced by a rear view mirror fitted in vehicles A) Is equal to one. B) Is less than one. C) Is more than one. D) Can be more than or less than one depending upon the position of the object in front of it. Show Answer Correct Answer: B) Is less than one. 16. A lens of focal length 12 cm forms an erect image, three times the size of the object. The object distance from measured from the optical centre will be A) 24 cm. B) 36 cm. C) 8 cm. D) 16 cm. Show Answer Correct Answer: C) 8 cm. 17. A light ray falls on a mirror and deviates by 60$^\circ$ then the angle of reflection will be A) 90$^\circ$. B) 30$^\circ$. C) 60$^\circ$. D) 180. Show Answer Correct Answer: C) 60$^\circ$. 18. The refractive index of dens flint glass is 1.65 and for alcohol, it is 1.36 with respect to air, then the refractive index of the dens flint glass with respect to alcohol is A) 1.11. B) 1.31. C) 1.01. D) 1.21. Show Answer Correct Answer: D) 1.21. 19. If an object is placed 21 cm from a converging lens, the image formed is slightly smaller than the object. If the object is placed at a distance of 19 cm from the lens, the image formed is slightly larger than the object. The approximate focal length of the lens is: A) 10 cm. B) 18 cm. C) 20 cm. D) 5 cm. Show Answer Correct Answer: A) 10 cm. 20. If the magnification produced by a lens has a negative value, the image will be A) Real and inverted. B) Real and erect. C) Virtual and erect. D) Virtual and inverted. Show Answer Correct Answer: C) Virtual and erect. 21. Which of the following can form a virtual image which is always smaller than the object? (a) a plane mirror (b) a convex lens (c) a concave lens (d) a concave mirror A) D. B) B. C) A. D) C. Show Answer Correct Answer: D) C. 22. The magnification produced by a concave mirror- A) Is always equal to one. B) Is always more than one. C) May be less than or greater than one. D) Is always less than one. Show Answer Correct Answer: C) May be less than or greater than one. 23. When parallel rays are incident on a concave mirror on reflection they meet at the A) Pole. B) Radius of curvature. C) Focus. D) None of these. Show Answer Correct Answer: C) Focus. 24. If the image is formed in front of the mirror, then the image distance will be A) Neither positive nor negative. B) Positive or negative depending on the size of the object. C) Negative. D) Positive. Show Answer Correct Answer: C) Negative. 25. Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object? A) 15 cm in front of the mirror. B) 30 cm in front of the mirror. C) Between 15 cm and and 30 cm in front of the mirror. D) More than 30 cm in front of the mirror. Show Answer Correct Answer: B) 30 cm in front of the mirror. 26. 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 focus. B) Behind the mirror. C) At the pole. D) At infinity. Show Answer Correct Answer: B) Behind the mirror. 27. Under which of the following conditions a concave mirror can form an image larger than the actual object? A) When the object is kept at a distance equal to its radius of curvature. B) When object is kept at a distance less than its focal length. C) When object is placed between the focus and centre of curvature. D) When object is kept at a distance greater than its radius of curvature. Show Answer Correct Answer: C) When object is placed between the focus and centre of curvature. 28. An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror or radius of curvature 30 cm. The position of the image is A) 8.57 cm. B) 8.15 cm. C) 7.15 cm. D) 9.10 cm. Show Answer Correct Answer: A) 8.57 cm. 29. A child is standing in front of a magic mirror. She finds the imageof her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top. A) Plane, convex and concave. B) Convex, concave and plane. C) Concave, plane and convex. D) Convex, plane and concave. Show Answer Correct Answer: C) Concave, plane and convex. 30. The magnification is always 1 for the following mirror A) Convex Mirror. B) Concave Mirror. C) Plane Mirror. D) None of these. Show Answer Correct Answer: C) Plane Mirror. 31. Which of these can be used to obtain a real image having the same size as the object? A) Only a Concave mirror. B) Convex mirror and Concave lens. C) Concave mirror and Convex lens. D) Concave mirror and Concave lens. Show Answer Correct Answer: C) Concave mirror and Convex lens. 32. What is the optical density? A) The optical density is a property of a transparent material that measures the speed of the light through the material. B) The optical density is a property of a transparent material that measures the angle refraction of the light through the material. C) The optical density is a property of a transparent material that measures the angle reflection of the light through the material. D) None of the above. Show Answer Correct Answer: A) The optical density is a property of a transparent material that measures the speed of the light through the material. 33. An object is placed at a distance of 40cm in front of a concave mirror of focal length of 20cm.The image produced is A) Virtual and inverted. B) Real and erect. C) Real, inverted and of the opposite size as that of the object. D) Real, inverted and of the same size as that of the object. Show Answer Correct Answer: D) Real, inverted and of the same size as that of the object. 34. Which of the following factors contributes to the bending of light? A) Change of colour of light. B) Change of speed of light. C) Change of energy of light. D) Change of density of light. Show Answer Correct Answer: B) Change of speed of light. 35. A concave mirror gives real, inverted and same size image if the object is placed A) Beyond C. B) At infinity. C) At F. D) At C. Show Answer Correct Answer: B) At infinity. 36. When a ray of light enters a glass slab from air- A) Its wavelength Increases. B) Its frequency increases. C) Its wavelength decreases. D) Neither wavelength nor frequency changes. Show Answer Correct Answer: C) Its wavelength decreases. 37. If an object is placed at the focus of a concave mirror where is the image formed A) At infinity. B) At focus. C) Beyond c. D) At centre of curvature. Show Answer Correct Answer: A) At infinity. 38. The distant object method can be used to find the focal length of which of the following? A) Only a Convex lens. B) Convex mirror and Convex lens. C) Concave mirror and Convex lens. D) Concave mirror and Concave lens. Show Answer Correct Answer: C) Concave mirror and Convex lens. 39. An object is moved at constant speed from infinity to the focus of a concave mirror: A) Image will move at constant speed from focus to infinity. B) Image will move slower in the begining and faster later on, away from the mirror. C) Image will move faster in the begining and slower later on, away from the mirror. D) Image will move away from the mirror in the begining and towards the mirror later on but with a constant speed. Show Answer Correct Answer: B) Image will move slower in the begining and faster later on, away from the mirror. 40. Magnification has a plus sign, then the image is A) Virtual and erect. B) Real and erect. C) Real and inverted. D) At infinity. Show Answer Correct Answer: A) Virtual and erect. 41. The point on the spherical mirror at the middle of the surface is called A) Centre of curvature. B) Focus. C) Radius of curvature. D) Pole. Show Answer Correct Answer: D) Pole. 42. A ray of light coming parallel to the principal axis after passing through a convex lens, has passed through its A) Focus. B) Optical centre. C) Center of curvature. D) Mid point. Show Answer Correct Answer: A) Focus. 43. Focal length of a concave mirror is A) Negative. B) Depends on the position of object. C) Positive. D) Depends on the position of image. Show Answer Correct Answer: A) Negative. 44. Which of the following is true with respect to magnification of spherical mirrorsa. It is the ratio of height of object to height of imageb. It can be also expressed as negative ratio of image distance to object distancec. Magnification is always greater than zero A) A and c. B) A and b. C) B and c. D) All are true. Show Answer Correct Answer: B) A and b. 45. Reflection is when light ..... A) Absorbs. B) Transmits. C) Bounces. D) Bends. Show Answer Correct Answer: C) Bounces. 46. To get an image larger than the object, one can use A) Convex mirror. B) Concave mirror. C) Plane mirror. D) Both Convex and Concave mirror. Show Answer Correct Answer: B) Concave mirror. 47. The mirror for which the magnification is always less than 1 A) Convex Mirror. B) Concave Mirror. C) Plane Mirror. D) None of these. Show Answer Correct Answer: A) Convex Mirror. 48. The speed of light in vacuum is A) 3 x 10$^{-8}$ m/s. B) 3 x 10$^{-4}$ m/s. C) 3 x 10$^{6}$ m/s. D) 3 x 10$^{8}$ m/s. Show Answer Correct Answer: D) 3 x 10$^{8}$ m/s. 49. According to New Cartesian Sign Convention:(a) focal length of concave mirror is positive and that of convex mirror is negative (b) focal length of both concave and convex mirrors is positive (c) focal length of both concave and convex mirrors is negative (d) focal length of concave mirror is negative and that of convex mirror is positive A) C. B) D. C) B. D) A. Show Answer Correct Answer: B) D. 50. An object is placed at the centre of curvature of a concave mirror.The distance between the object and its image is A) Equal to f. B) Zero. C) Equal to 2f. D) Equal to 4f. Show Answer Correct Answer: B) Zero. 51. Light traveling through the air moves in a straight line. An object viewed through water looks different because light rays that travel through water are- A) Absorbed. B) Bounced. C) Bent. D) Reflected. Show Answer Correct Answer: C) Bent. 52. Focal length of plane mirror is A) At infinity. B) Zero. C) Negative. D) None of these. Show Answer Correct Answer: A) At infinity. 53. The radius of curvature of a mirror is 20cm the focal length is A) 10 cm. B) 20 cm. C) 5 cm. D) 40 cm. Show Answer Correct Answer: A) 10 cm. 54. In which direction A Ray of light bends when it goes from water to glass? A) Away from normal. B) Towards the normal. C) No change in path. D) None of the above. Show Answer Correct Answer: B) Towards the normal. 55. A small air bubble in a glass block when seen from above appears to be raised because of A) Refraction of light. B) Reflection of light. C) Reflection and refraction of light. D) None of the above. Show Answer Correct Answer: A) Refraction of light. 56. A real image of an object is to be obtained. The mirror required for this purpose is (a) convex (b) concave (c) plane (d) either convex or concave A) A. B) B. C) D. D) C. Show Answer Correct Answer: B) B. 57. 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) 25 cm. B) 15 cm. C) 75 cm. D) 60 cm. Show Answer Correct Answer: C) 75 cm. 58. Where is the object placed in front of concave mirror to get virtual image? A) Between mirror and F. B) On focal point. C) Between F and C. D) On C. Show Answer Correct Answer: A) Between mirror and F. 59. Why the rear-view mirrors in vehicles are convex mirrors? A) These mirrors give virtual erect image and slightly diminished image. B) Concave mirror also gives virtual erect image but these are highly magnified. C) Both of these. D) None of these. Show Answer Correct Answer: A) These mirrors give virtual erect image and slightly diminished image. 60. Which of the following characteristics are correct for the image formed in a plane mirror?I. Upright II. InvertedIII. Real IV. Same size as the objectV. Virtual A) I, II, III. B) I, III, IV. C) III, II, V. D) I, IV, V. Show Answer Correct Answer: D) I, IV, V. Next →Related QuizzesScience QuizzesClass 10 QuizzesClass 10 Science Chapter 10 Light Reflection And Refraction Quiz 2Class 10 Science Chapter 10 Light Reflection And Refraction Quiz 3Class 10 Science Chapter 10 Light Reflection And Refraction Quiz 4 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books