This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Light > Class 7 Science Chapter 11 Light – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 18 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... enables us to view our surrounding A) Convex mirror. B) Air. C) Light. D) None of the above. Show Answer Correct Answer: C) Light. 2. If a ray of light strikes the surface of separation at ..... degrees, the ray goes undeviated. A) 360$^{0}$. B) 180$^{0}$. C) 120$^{0}$. D) 90$^{0}$. Show Answer Correct Answer: D) 90$^{0}$. 3. An object placed 3 m from a plane mirror is shifted by 0.4 m away from the mirror. What is the new distance between the object and its image? A) 5.2 m. B) 6 m. C) 6.4 m. D) 6.8 m. Show Answer Correct Answer: D) 6.8 m. 4. Function of ciliary muscles is to A) Reflect the light. B) Absorb the light. C) Adjust the focus of eye lens. D) Dilate the eye. Show Answer Correct Answer: C) Adjust the focus of eye lens. 5. In the formation of a rainbow, what acts as tiny prisms? A) Droplets of rain. B) Clouds. C) Sky. D) None of the above. Show Answer Correct Answer: A) Droplets of rain. 6. Light goes and comes back in a A) Staright line. B) No it does not. C) Non of the above. D) None of the above. Show Answer Correct Answer: A) Staright line. 7. The laws of reflection hold good for A) Plane mirror only. B) Concave mirror only. C) Convex mirror only. D) All mirrors irrespective of their shape. Show Answer Correct Answer: D) All mirrors irrespective of their shape. 8. As the frequency of light increases, the wavelength becomes shorter. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 9. An image formed by a concave lens can be obtain on a screen A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. Refractive index of water is 4/3, the apparent depth is A) 3/4th of any liquid. B) 3/4th of the real depth. C) It is the same. D) None of these. Show Answer Correct Answer: B) 3/4th of the real depth. 11. Which of the following letters will be seen without any change in a plane mirror? A) S. B) L. C) T. D) P. Show Answer Correct Answer: C) T. 12. The angle between incident ray and reflected ray is 60$^\circ$. What is the value of angle of incidence? A) 60. B) 30. C) 35. D) 120. Show Answer Correct Answer: B) 30. 13. Which place is periscopes not used? A) Swimming pool. B) Submarines. C) War trenches. D) Tanks. Show Answer Correct Answer: A) Swimming pool. 14. Diffused reflection gives a sharp image. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 15. Objects that do not have their own light are called Luminous Objects. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. Which material is opaque? A) Glass. B) Water. C) Tissue Paper. D) Brick. Show Answer Correct Answer: D) Brick. 17. Splits water (H$_{2}$O) into hydrogen (H) and oxygen (O) atoms. Light dependent or light independent stage? A) Light independent stage. B) Light dependent stage. C) All the above. D) None of the above. Show Answer Correct Answer: B) Light dependent stage. 18. Which of the following changes occur when you walk out of bright sunshine into poorly lit room? A) The pupil becomes larger. B) The lens becomes thicker. C) The ciliary muscle relaxes. D) The pupil becomes smaller. Show Answer Correct Answer: A) The pupil becomes larger. 19. Cardboard, wood, and books are some examples of ..... objects. A) Opaque. B) Reflection. C) Transparent. D) Translucent. Show Answer Correct Answer: A) Opaque. 20. A ray of light is incident on a plane mirror at an angle of 30$^\circ$.what is the angle of refrection? A) 20$^\circ$. B) 10$^\circ$. C) 30$^\circ$. D) 40$^\circ$. Show Answer Correct Answer: C) 30$^\circ$. 21. When you look at an object and it appears red, why is that the case? A) It absorbs red light. B) It reflects red light and absorbs all of the other colors of visible light. C) It reflects all of the colors of visible light. D) It reflects all of the colors of visible light except for red light. Show Answer Correct Answer: B) It reflects red light and absorbs all of the other colors of visible light. 22. Refraction occurs best with A) Lenses and water. B) Lenses. C) Water. D) Lenses and gas. Show Answer Correct Answer: A) Lenses and water. 23. Who is Target Audience for IdeaPad Notebooks? A) Trend Setters. B) Elite Customers. C) Design Trend Follower. D) All of the above. Show Answer Correct Answer: C) Design Trend Follower. 24. The taking in of light by a material ..... A) Refraction. B) Reflection. C) Dark colors. D) Absorption. Show Answer Correct Answer: D) Absorption. 25. Water is a reactant. Light dependent or light independent stage? A) Light independent stage. B) Light dependent stage. C) All the above. D) None of the above. Show Answer Correct Answer: B) Light dependent stage. 26. Which of the following is an example of an illuminated object? A) Moon. B) Light bulb. C) Stars. D) Fireflies. Show Answer Correct Answer: A) Moon. 27. What does the rectilinear propagation of light states? A) Light travels in curved lines. B) Light travels in straight lines. C) Light refracts through a lens. D) Light travels at a speed of 3, 00, 000 Km/s. Show Answer Correct Answer: B) Light travels in straight lines. 28. What is the best description of a transparent material? A) No light passes through the material. B) Some light passes through the material. C) All light passes through the material. D) None of the above. Show Answer Correct Answer: C) All light passes through the material. 29. Light travels faster that sound through denser materials. A) True. B) False, it travels more slowly. C) All the above. D) None of the above. Show Answer Correct Answer: B) False, it travels more slowly. 30. Light travels fastest in vacuum with the speed of A) 3x10$^{-8}$m/s. B) 3x10$^{10}$m/s$^{2}$. C) 3x10$^{10}$m/s. D) 3x10$^{8}$m/s. Show Answer Correct Answer: D) 3x10$^{8}$m/s. 31. Light will be reflected in many different directions off of a ..... surface. A) Smooth. B) Mirrored. C) Rough. D) Flat. Show Answer Correct Answer: C) Rough. 32. ..... is an imaginary line that divides a mirror into half. A) Incident angle. B) Focal point. C) Optical axis. D) Equator. Show Answer Correct Answer: C) Optical axis. 33. The question is about addition of colors (in light) Red+green= (a) A) Cyan. B) A. yellow. C) All the above. D) None of the above. Show Answer Correct Answer: B) A. yellow. 34. Autotrophs (producers) can perform photosynthesis because they have- A) Chloroplasts. B) Ribosomes. C) Mitochondria. D) A Nucleus. Show Answer Correct Answer: A) Chloroplasts. 35. ..... mirrors are used as rear view mirrors in cars. A) Concave. B) Convex. C) Plane. D) None. Show Answer Correct Answer: B) Convex. 36. A material that allows almost all of the light striking it to pass through, and through which objects can be seen clearly A) Transparent. B) Translucent. C) Opaque. D) None of the above. Show Answer Correct Answer: A) Transparent. 37. Fluorescent tube light, incandescent lamp and Neon lamp are examples of Natural Sources of Light A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 38. CHANGING OF DIRECTION OF LIGHT WHEN IT FALLS ON AN OBJECT A) REFLECTION. B) LUMINOUS. C) REFRACTION. D) None of the above. Show Answer Correct Answer: A) REFLECTION. 39. Oxygen gas is a product. Light dependent or light independent stage? A) Light independent stage. B) Light dependent stage. C) All the above. D) None of the above. Show Answer Correct Answer: B) Light dependent stage. 40. The highest point on a wave A) Trough. B) Wavelength. C) Crest. D) Amplitude. Show Answer Correct Answer: C) Crest. 41. The bending of light as it passes from one medium to the other is A) Refraction. B) Reflection. C) Translucent. D) None of the above. Show Answer Correct Answer: A) Refraction. 42. When light travels through two different materials it bends and changesdirection because the speed of light changes. This is called ..... A) Reflection. B) Refraction. C) All the above. D) None of the above. Show Answer Correct Answer: B) Refraction. 43. A refracting telescope uses a concave and a A) Concave mirror. B) Convex lens. C) Both a and c. D) Convex mirror. Show Answer Correct Answer: C) Both a and c. 44. The imaginary line perpendicular to a reflecting surface is called ..... A) Crooked line. B) Parallel line. C) Angular line. D) Normal line. Show Answer Correct Answer: D) Normal line. 45. Objects that allow only a small amount of light to pass through them are called as- A) Opaque Object. B) Transparent Object. C) Translucent Object. D) None of these. Show Answer Correct Answer: C) Translucent Object. 46. A lens that bends light rays outward. A) Concave lens. B) Convex lens. C) Reflect. D) Refract. Show Answer Correct Answer: A) Concave lens. 47. For us to be able to see an object A) There must be a source of light. B) The light must strike the object. C) The light must be reflected from the object to the eye. D) All of these. Show Answer Correct Answer: D) All of these. 48. Lens used in spectacles for correction of defects of vision is A) Always convex. B) Lens of different shape. C) Always concave. D) Concave or convex. Show Answer Correct Answer: D) Concave or convex. 49. A plane mirror always produces ..... images. A) Ideal. B) Refracted. C) Virtual. D) Real. Show Answer Correct Answer: C) Virtual. 50. What part of the plant cell performs photosynthesis? A) The Mitochondrion. B) The Nucleus. C) The Chloroplast. D) The Cell Wall. Show Answer Correct Answer: C) The Chloroplast. 51. The bending of light when it moves from one material to another. A) Absorption. B) Prism. C) Reflection. D) Refraction. Show Answer Correct Answer: D) Refraction. 52. All the colors of light mixed together produces ..... light. A) Black. B) Brown. C) White. D) No. Show Answer Correct Answer: C) White. 53. Name the type of mirrors used in the following situations:(i) Used by Dentist.(ii) Rear-view mirror of vehicle A) (i) Diverging mirror(ii) Converging mirror. B) (i) & (ii) Both Converging mirror. C) (i) Converging mirror(ii) Diverging mirror. D) (i) & (ii) Both Diverging mirror. Show Answer Correct Answer: C) (i) Converging mirror(ii) Diverging mirror. 54. The surface of the water A) Change the path of the light. B) Will not change the path of the light. C) Act as a insulator. D) None of the above. Show Answer Correct Answer: A) Change the path of the light. 55. Write the order of the celestial bodies in a Lunar eclipse. A) Sun, Moon, Earth. B) Sun, Earth, Moon. C) Moon, Earth, Sun. D) Earth, Sun, Moon. Show Answer Correct Answer: B) Sun, Earth, Moon. 56. An object of 5cm in length is held 25cm away from a converging lens of focal length 10cm, find the position of image A) 7/50 cm. B) 3/50cm. C) 50/3 cm. D) 50/7 cm. Show Answer Correct Answer: C) 50/3 cm. 57. Darkest Part of the shadow is ..... A) Umrah. B) Penumbra. C) Umbra. D) Bum. Show Answer Correct Answer: C) Umbra. 58. A traffic signal uses ..... lights to tell drivers to stop or go. A) Colored. B) Flashing. C) All the above. D) None of the above. Show Answer Correct Answer: A) Colored. 59. Which of the following visible spectrum will bend the least? A) Red. B) Blue. C) Violet. D) Orange. Show Answer Correct Answer: A) Red. 60. When the pigmentation of the iris is the least, the iris is ..... in colour. A) Green. B) Blue. C) Brown. D) Black. Show Answer Correct Answer: B) Blue. ← PreviousNext →Related QuizzesScience QuizzesClass 7 QuizzesClass 7 Science Chapter 11 Light Quiz 1Class 7 Science Chapter 11 Light Quiz 2Class 7 Science Chapter 11 Light Quiz 3Class 7 Science Chapter 11 Light Quiz 4Class 7 Science Chapter 11 Light Quiz 5Class 7 Science Chapter 11 Light Quiz 6Class 7 Science Chapter 11 Light Quiz 7Class 7 Science Chapter 11 Light Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books