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 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 10 Light Reflection And Refraction Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The path along which light travels in a homogeneous medium is called a- A) Beam of light. B) Ray of light. C) Pencil of light. D) None of these. Show Answer Correct Answer: B) Ray of light. 2. In order to obtain a magnification of, -0.75 with a convex lens of focal length 8 cm, the object should be placed:(a) at less than 8 cm (b) between 8 cm and 16 cm (c) beyond 16 cm (d) at 16 cm A) D. B) C. C) B. D) A. Show Answer Correct Answer: B) C. 3. What is the relation between radius of curvature R and focal length f of a mirror? A) R=2/f. B) F=2R. C) R = 2f. D) R=1/2f. Show Answer Correct Answer: C) R = 2f. 4. Describe an application of Snell's Law in real life. A) Eyeglasses design. B) Driving a car. C) Building a house. D) Baking cookies. Show Answer Correct Answer: A) Eyeglasses design. 5. If the image formed is always virtual, the mirror can be:(a) concave or convex (b) concave or plane (c) convex or plane (d) only conve A) C. B) D. C) A. D) B. Show Answer Correct Answer: A) C. 6. A lens of power +2.0D is placed in contact with another lens of power-1.0D, the combination will behave like:- A) A converging lens of focal length 100 cm. B) A converging lens of focal length 50 cm. C) A diverging lens of focal length 100 cm. D) A diverging lens of focal length 50 cm. Show Answer Correct Answer: A) A converging lens of focal length 100 cm. 7. A concave mirror A) Curves outwards. B) Curves sideways. C) Curves in multiple directions. D) Curves inwards. Show Answer Correct Answer: D) Curves inwards. 8. Second law of reflection states that? A) The incident angle, the reflected angle and the normal all lie in same plane. B) The incident ray, the reflected ray and the surface of object all lie in same plane. C) The incident angle, the incident ray and the normal all lie in same plane. D) The incident ray, the reflected ray and the normal all lie in same plane. Show Answer Correct Answer: D) The incident ray, the reflected ray and the normal all lie in same plane. 9. You are provided with two convex lenses of focal length 10 cm and 20 cm. Which of the among these two lenses will you suggest to obtain a greater convergence of the refracted light? A) Lens with f of 10 cm. B) Lens with f of 20 cm. C) None of the above. D) Both of them. Show Answer Correct Answer: A) Lens with f of 10 cm. 10. Refractive index of glass with respect to air is 1.5 and refractive index of water with respect to air is 4/3. What will be the refractive index of glass with respect to water? A) 1. B) -10. C) 1.5. D) 1.125. Show Answer Correct Answer: D) 1.125. 11. Assertion:Convex mirror is used as a shaving mirror. Reason:Convex minor always forms an enlarged image. 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: D) Both Assertion and Reason are false. 12. A mirror magnifies the image of an object by minus 1.5 times. Which of the following is true about the image produced by the mirror? A) The image is real and larger than the object. B) The image is real and smaller than the object. C) The image is virtual and larger than the object. D) The image is virtual and smaller than the object. Show Answer Correct Answer: A) The image is real and larger than the object. 13. Choose the correct option. In a concave mirror, the image formed is always bigger than the size of object when the object is placed:i) At principal focus ii) At centre of curvature iii) Beyond centre of curvature iv) Between pole and focus A) (i) only. B) (i) and (iii). C) (ii) only. D) (i) and (iv). Show Answer Correct Answer: D) (i) and (iv). 14. The image formed by a concave mirror has the magnification of +3, then where was the object placed? A) Beyond f. B) Between f and c. C) Between f and p. D) In the virtual side of mirror. E) Beyond c. Show Answer Correct Answer: C) Between f and p. 15. Refractive index of a medium with respect to vacuum is called A) Relative refractive index. B) Absolute refractive index. C) Advanced refractive index. D) None of the above. Show Answer Correct Answer: B) Absolute refractive index. 16. 3 times magnified and erect image is formed by a concave mirror of focal length 20cm and radius of curvature 40cm. The object is placed between ..... cm and ..... cm from the pole A) 19.9, 20.1. B) 20.1, 39.9. C) 0, 19.9. D) 39.9, 40.1. Show Answer Correct Answer: C) 0, 19.9. 17. Which of the following can make a parallel beam of light when light from a point source is incident on it? A) (a) Concave mirror as well as convex lens. B) C) Two plane mirrors placed at 90$^\circ$ to each other. C) (d) Concave mirror as well as concave lens. D) (b) Convex mirror as well as concave lens. Show Answer Correct Answer: A) (a) Concave mirror as well as convex lens. 18. $\frac{1}{v}+\frac{1}{x}=\frac{1}{f}$ A) -u. B) Vo1. C) Vl. D) U2. E) U. Show Answer Correct Answer: A) -u. 19. When light goes from one material(medium) to another it becomes bent, what term means bent? A) Absorbed. B) Turned. C) Refracted. D) Reflected. Show Answer Correct Answer: C) Refracted. 20. What happens to the speed of light when it enters a medium with a higher refractive index? A) It decreases. B) It becomes zero. C) It remains the same. D) It increases. Show Answer Correct Answer: A) It decreases. 21. Two objects A and B when placed in turn in front of a concave mirror of focal length 7.5 cm, give images of equal size. If A is three times the size of B and is placed 30 cm from mirror, what is the distance of B from the mirror- A) 15cm. B) 17.5 cm. C) 12.5 cm. D) 10 cm. Show Answer Correct Answer: A) 15cm. 22. Lens formula is given as A) 1/v-1/u = 1/f. B) 1/v + 1/u = 1/f. C) 1/u-1/v = 1/f. D) None of these. Show Answer Correct Answer: A) 1/v-1/u = 1/f. 23. Power of the lens is-5D, its focal length is A) -40m. B) World Cup. C) -25m. D) 0.M. Show Answer Correct Answer: D) 0.M. 24. Second law of reflection states that angle of incidence and angle of reflection is A) Always equal. B) Never equal. C) Sometime equal. D) None of the above. Show Answer Correct Answer: A) Always equal. 25. How is light affected by an increase in the index of refraction? A) Its frequency decreases. B) Its speed decreases. C) Its frequency increases. D) Its speed increases. Show Answer Correct Answer: B) Its speed decreases. 26. When light hits an area and bounces back it is called: A) Reflection. B) Refraction. C) Echo. D) Absorbing. Show Answer Correct Answer: A) Reflection. 27. What does refraction mean? A) Bending light. B) Bouncing light. C) All the above. D) None of the above. Show Answer Correct Answer: A) Bending light. 28. 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 center of curvature. Show Answer Correct Answer: B) Be parallel to the principal axis. 29. In which of the following, the image of an object placed at infinity will be highly diminished and point sized? A) Concave mirror only. B) Convex mirror only. C) Convex lens only. D) Concave mirror, convex mirror, concave lens and convex lens. Show Answer Correct Answer: D) Concave mirror, convex mirror, concave lens and convex lens. 30. Which of the following is not the characteristics of the image formed on a plane mirror? A) Virtual. B) Laterally inverted. C) Erect. D) Enlarged. Show Answer Correct Answer: D) Enlarged. 31. The ratio of the refractive index of red light to blue light in air is A) Equal to unity. B) Less than unity. C) Greater than unity. D) Less as well as grater than unity depending upon the experimental arrangement. Show Answer Correct Answer: B) Less than unity. 32. Under what condition will a glass lens placed in a transparent liquid become invisible? A) When focal length of lens is equal to the speed of light in liquid. B) When refractive index of lens is not equal to the speed of light in liquid. C) When wavelength of light in lens is not equal to the wavelength in liquid. D) When refractive index of lens is equal to the refractive index in liquid. Show Answer Correct Answer: D) When refractive index of lens is equal to the refractive index in liquid. 33. A positive sign in the value of magnification indicates that the image is A) Virtual. B) Near. C) Enlarged. D) Real. Show Answer Correct Answer: C) Enlarged. 34. What is the mirror formula? A) 1/f = 1/u-1/v. B) 1/f = 1/v + 1/u. C) 1/f = u + v. D) 1/u = 1/f + 1/v. Show Answer Correct Answer: B) 1/f = 1/v + 1/u. 35. A ..... mirror is used as a head mirror by the doctors to concentrate light on the body parts to be examined. A) Concave. B) Convex. C) All the above. D) None of the above. Show Answer Correct Answer: A) Concave. 36. What is the formula for calculating refractive index? A) Refractive Index = Speed of Sound in Vacuum / Speed of Sound in Medium. B) Refractive Index = Frequency of Light in Vacuum / Frequency of Light in Medium. C) Refractive Index = Speed of Light in Vacuum / Speed of Light in Medium. D) Refractive Index = Wavelength of Light in Vacuum / Wavelength of Light in Medium. Show Answer Correct Answer: C) Refractive Index = Speed of Light in Vacuum / Speed of Light in Medium. 37. An object is placed 40.0 cm in front of a convex mirror. The image appears 15 cm behind the mirror. What is the focal length of the mirror? A) -11. B) +24. C) +11. D) -24. Show Answer Correct Answer: D) -24. 38. What is the critical angle in the context of light refraction? A) The critical angle is not affected by the medium through which light is passing. B) The critical angle is the angle of refraction that results in total internal reflection. C) The critical angle in the context of light refraction is the angle of incidence that results in the refracted ray being at 90 degrees to the normal line. D) The critical angle is always less than the angle of incidence. Show Answer Correct Answer: C) The critical angle in the context of light refraction is the angle of incidence that results in the refracted ray being at 90 degrees to the normal line. 39. When the light passes out of the glass, back into the air A) It does not bend. B) It continues to be the normal. C) It bends towards the normal. D) It bends away from the normal. Show Answer Correct Answer: D) It bends away from the normal. 40. Coming back of light rays to the same medium when they fall on a body is known as A) Refraction. B) Reflection. C) Both. D) None of the above. Show Answer Correct Answer: B) Reflection. 41. We get a virtual image with a concave mirror when the object is placed between A) Pole and Focus. B) Focus and Centre of curvature. C) On centre of curvature. D) Beyond centre of curvature. Show Answer Correct Answer: A) Pole and Focus. 42. What is used in spectacles? A) Convex mirror. B) Concave mirror. C) Convex lens or concave lens. D) Neither of above. Show Answer Correct Answer: C) Convex lens or concave lens. 43. A convex lens forms a real image of a point object placed on its principal axis. If the upper half of the lens is painted black. A) The image will be shifted backward. B) The image will not be shifted. C) The intensity of the image will decrease. D) Both (B) and (C). Show Answer Correct Answer: C) The intensity of the image will decrease. 44. Refraction is when light ..... A) Transmits. B) Bends. C) Absorbs. D) Bounces. Show Answer Correct Answer: B) Bends. 45. David is observing his image in a plane mirror. The distance between the mirror and his image is 5m. If he moves 1m towards the mirror, then the distance between David and his image will be- A) 5 m. B) 3 m. C) 6 m. D) 8 m. Show Answer Correct Answer: D) 8 m. 46. Power of a lens is the ..... of its focal length. A) Value. B) 2 times. C) Reciprocal. D) Half. Show Answer Correct Answer: C) Reciprocal. 47. Which mirror can produce a virtual, erect and magnified image of an object? A) Both concave and convex mirrors. B) Plane mirror. C) Convex mirror. D) Concave mirror. Show Answer Correct Answer: D) Concave mirror. 48. A person standing in front of a mirror finds his image larger than himself. This shows that mirror is convex in nature. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 49. When a ray of light enters from one medium to another having different optical densities it bends. beacuse A) Obstruction of light changes. B) Of different optical densities. C) Frequency of light changes. D) Speed of light changes. Show Answer Correct Answer: D) Speed of light changes. 50. Objects that reflect well are A) Smooth, shiny surfaces. B) Medium coloured surfaces. C) Matte surfaces. D) Dark coloured surfaces. Show Answer Correct Answer: A) Smooth, shiny surfaces. 51. A convex lens of focal length 15 cm produces a magnification of + 4. The object is placed:(a) at a distance of 15 cm (b) between 15 cm and 30 cm (c) at less than 15 cm (d) beyond 30 cm A) C. B) D. C) B. D) A. Show Answer Correct Answer: A) C. 52. A divergent lens will produce A) Always real image. B) Always virtual image. C) Both real and virtual image. D) None of these. Show Answer Correct Answer: B) Always virtual image. 53. 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. Show Answer Correct Answer: C) Beyond 2f. 54. Refractive index of diamond with respect to glass is 1.6. If the absolute refractive index of glass is 1.5, then the absolute refractive index of diamond is A) 2.4. B) 4.4. C) 3.4. D) 1.4. Show Answer Correct Answer: A) 2.4. 55. Which of the following statements is not true about Laws of Reflection? A) Laws of Reflection can be applied to a surface which experiences regular reflection. B) Laws of Reflection can be applied only to highly polished plane mirrors and spherical mirrors. C) For a surface which obeys the Laws of Reflection, the angle of incidence is equal to the angle of reflection. D) Laws of Reflection can be applied to any surface. Show Answer Correct Answer: D) Laws of Reflection can be applied to any surface. 56. A child walks towards a fixed plane mirror at a speed of 5 km h-1. The velocity of the image with respect to mirror is- A) 5 km h-1. B) -10 km h-1. C) -5 km h-1. D) 10 km h-1. Show Answer Correct Answer: C) -5 km h-1. 57. The image formed by a convex lens can be A) Virtual image is not formed. B) Virtual and of same size. C) Virtual and diminished. D) Virtual and magnified. Show Answer Correct Answer: D) Virtual and magnified. 58. Which of these relations does not pertain to spherical mirrors? A) $f=\frac{r}{2}$. B) $\frac{1}{v}+\frac{1}{u}=\frac{1}{f}$. C) $\frac{1}{v}-\frac{1}{u}=\frac{1}{f}$. D) $ m = \frac {v} {u} $. Show Answer Correct Answer: C) $\frac{1}{v}-\frac{1}{u}=\frac{1}{f}$. 59. The image formed by a concave mirror is real, invertedand of the same size as that of the object. The position of the object shouldbe- A) Beyond C. B) Between C and F. C) At C. D) At F. Show Answer Correct Answer: C) At C. 60. Bending of light when it passes from one medium to another is called A) Disturbance. B) Reflection. C) Refraction. D) None of the above. Show Answer Correct Answer: C) Refraction. ← PreviousNext →Related QuizzesScience QuizzesClass 10 QuizzesClass 10 Science Chapter 10 Light Reflection And Refraction Quiz 1Class 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