This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Light > Class 7 Science Chapter 11 Light – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What do we call the dark area that forms when an object blocks light? A) Glare. B) Illumination. C) Shadow. D) Reflection. Show Answer Correct Answer: C) Shadow. 2. What is a difference between reflection and refraction? A) In reflection the light goes through and in refraction the light does not go through. B) In reflection the light does not go through, in refraction it does go through. C) Reflection means to bend and refraction means to bounce off of. D) Refraction means to stop and reflection means to go. Show Answer Correct Answer: B) In reflection the light does not go through, in refraction it does go through. 3. The splitting of white light into its seven constituent colours is called A) Deviation. B) Reflection. C) Refraction. D) Dispersion. Show Answer Correct Answer: D) Dispersion. 4. When light travels from air to glass the light bends ..... A) AWAY. B) TOWARD. C) All the above. D) None of the above. Show Answer Correct Answer: B) TOWARD. 5. How is a rainbow formed? A) When it rains, the air reflects all of the colors in a rainbow. B) Some light is absorbed by air and some is reflected by the raindrops. C) We only see rainbows when it is raining. D) Light rays pass through raindrops and refract. Show Answer Correct Answer: D) Light rays pass through raindrops and refract. 6. Frosted glass is an example of which type of material? A) Transparent. B) Translucent. C) Opaque. D) Radiant. Show Answer Correct Answer: B) Translucent. 7. A ..... or screen is needed to obtain a shadow. A) Carpet. B) Window. C) Surface. D) Wood. Show Answer Correct Answer: C) Surface. 8. Light cannot travel in every surface A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 9. Number of waves produced in one second A) Frequency. B) Crest. C) Trough. D) Wavelength. Show Answer Correct Answer: A) Frequency. 10. Different light sources give different light intensities. True or False A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. ..... comprises of a cylindrical glass tube sealed at both ends and containing a mixture of an inert gas, generally argon and low-pressure mercury vapor. A) Mercury vapor. B) Metal Halide. C) Incandescent. D) Fluorescent lamp. Show Answer Correct Answer: D) Fluorescent lamp. 12. How many images are formed, if the angle is 10? A) Infinity. B) 26. C) 35. D) 10. Show Answer Correct Answer: C) 35. 13. As the distance of the object from the mirror increases, the distance of the image also ..... A) Decreases. B) Increases. C) It remains the same. D) None of these. Show Answer Correct Answer: B) Increases. 14. When white light enters a prism, it gets split into its constituent colours. This is due to A) Different refractive index for different wavelength of each colour. B) Prism material have high density. C) Scattering of light. D) Each colours has same velocity in the prism. Show Answer Correct Answer: A) Different refractive index for different wavelength of each colour. 15. A converging lens is also known as a ..... lens. A) Concave. B) Refracted. C) Double. D) Convex. Show Answer Correct Answer: D) Convex. 16. Which of the following types of lamps provides the best color rendition of skin tones? A) Cool-white fluorescent. B) Mercury vapor. C) Metal Halide. D) Incandescent. Show Answer Correct Answer: D) Incandescent. 17. Can we create multiple images using only two mirrors A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 18. The ray of light that strikes a reflecting surface is called ..... A) Incident ray. B) Reflected ray. C) Normal ray. D) None of the above. Show Answer Correct Answer: A) Incident ray. 19. Meaning of Reflected A) A ray of bouncing off a mirror. B) To soak up. C) A material that lets light pass through. D) A solid material that blocks light and makes shadows. Show Answer Correct Answer: A) A ray of bouncing off a mirror. 20. On which property of light does periscopes work? A) Light travels in a straight line. B) Reflection of light. C) Angle of incidence= angle of reflection. D) None of the above. Show Answer Correct Answer: B) Reflection of light. 21. When light energy is absorbed by another object, it ..... A) Takes it in. B) Bounces off it. C) Disappears. D) Bends it. Show Answer Correct Answer: A) Takes it in. 22. A ..... breaks white light into colors. A) Visible spectrum. B) Shadow. C) Lens. D) Prism. Show Answer Correct Answer: D) Prism. 23. If the ability of a lens is a diapter its confluence is away A) 2.5 meters. B) 2.0 meters. C) 1.5 meters. D) 1.0 meters. Show Answer Correct Answer: D) 1.0 meters. 24. Twinkling of stars is due to atmospheric A) Dispersion of light by water droplets. B) Scattering of light by dust particles. C) Internal reflection of light by clouds. D) Refraction of light by different layers of varying refractive indices. Show Answer Correct Answer: D) Refraction of light by different layers of varying refractive indices. 25. What does dark mean? A) Too much light. B) The night. C) Absence of light. D) The Moon. Show Answer Correct Answer: C) Absence of light. 26. Bouncing of light A) Refraction. B) Reflection. C) Dispersion. D) None. Show Answer Correct Answer: B) Reflection. 27. The path of light is always straight and never curved. A) True. B) False. C) May be true or false. D) None of these. Show Answer Correct Answer: A) True. 28. The function accomplished by the light-dependent reactions is ..... A) Energy and electron storage. B) Sugar production. C) Carbon fixation. D) Conversion of sugar. Show Answer Correct Answer: A) Energy and electron storage. 29. Represents the range of colors you see when light is divided by a prism. A) Stars. B) Water. C) Spectrum. D) Heat. Show Answer Correct Answer: C) Spectrum. 30. Sun is a ..... object. A) Opaque. B) Non-Luminous. C) Luminous. D) Translucent. Show Answer Correct Answer: C) Luminous. 31. An object 5 cm in size is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 40 cm. Find out the position, size and nature of the image formed. A) V = + 10 cmh' = + 2.5 cmVirtual, Erect and smaller in size. B) V =-20 cmh' =-0.5 cmReal, Inverted and enlarge in size. C) V = + 20 cmh' = + 0.5 cmReal, Inverted and enlarge in size. D) V =-10 cmh' =-2.5 cmVirtual, Erect and smaller in size. Show Answer Correct Answer: A) V = + 10 cmh' = + 2.5 cmVirtual, Erect and smaller in size. 32. Which is an example of a heavier than air aircraft? A) Rocket. B) Airship/Zepplin. C) All the above. D) None of the above. Show Answer Correct Answer: A) Rocket. 33. 4) An object is placed at 100 mm in front of a concave mirror which produces an upright image (erect image). The radius of curvature of the mirror is: A) A ) less than 100 mm. B) B) between 100 mm and 200 mm. C) C) exactly 200 mm. D) D) more than 200 mm. Show Answer Correct Answer: D) D) more than 200 mm. 34. Which has less energy than visible light? A) Radio waves. B) X-Rays. C) Gamma rays. D) UV light. Show Answer Correct Answer: A) Radio waves. 35. Example of a luminous object is A) Sun. B) Book. C) Wall. D) Door. Show Answer Correct Answer: A) Sun. 36. A person suffering from ..... can see nearby objects but cannot see distant objects clearly. A) Hypermatropia. B) Cataract. C) Myopia. D) Presbyopia. Show Answer Correct Answer: C) Myopia. 37. Why are convex mirrors used by drivers as rear view mirrors in vehicles? A) They produce images which are clearer than those produced by others. B) They give a wide field of view. C) They produce magnified images. D) They reflect light better than other mirrors. Show Answer Correct Answer: B) They give a wide field of view. 38. Which of the following is another way of transforming energy from the Sun? A) Plants use sunlight for photosynthesis to make food. B) Sunlight helps us see during the day. C) Planets move around the Sun. D) Sunlight makes us feel happy. Show Answer Correct Answer: A) Plants use sunlight for photosynthesis to make food. 39. The television screen is a light source A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 40. Why can you see most objects? A) They emit light. B) They absorb light. C) Light refracts through them. D) Light reflects off them. Show Answer Correct Answer: D) Light reflects off them. 41. When the surface of a mirror curves inward, like the inside of a bowl, it is called a A) Concave Mirror. B) Plane Mirror. C) Convex Mirror. D) Diffuse Mirror. Show Answer Correct Answer: A) Concave Mirror. 42. Plane Mirror show- A) Real Image. B) Virtual Image. C) All the above. D) None of the above. Show Answer Correct Answer: B) Virtual Image. 43. *The organelle responsible for photosynthesis: A) Chloroplast. B) Nuclear membrane. C) Mitochondria. D) Vacuole. E) Cytoplasm. Show Answer Correct Answer: A) Chloroplast. 44. Shadows are longest in the ..... A) Morning. B) Evening. C) Night. D) Afternoon. Show Answer Correct Answer: A) Morning. 45. Which of the following is NOT a characteristic feature of a convex mirror? A) The image is virtual. B) The image is real. C) The image is diminished in size. D) The image is erect. Show Answer Correct Answer: B) The image is real. 46. What color do we see when all light is absorbed? A) Black. B) Red. C) Rainbow. D) White. Show Answer Correct Answer: A) Black. 47. What happens to the speed of light when a pencil placed in a glass of water appears broken at the surface of the water? A) It is increasing. B) It is decreasing. C) It stops. D) T does not change. Show Answer Correct Answer: B) It is decreasing. 48. An image obtain on screen is A) Upright. B) Erect. C) Real. D) Virtual. Show Answer Correct Answer: C) Real. 49. Light passes through glass windows because of ..... A) Transfusion. B) Transmission. C) Absorption. D) Reflection. Show Answer Correct Answer: B) Transmission. 50. Which is a manmade source of light? A) Fire. B) Sun. C) Flashlight. D) Star. Show Answer Correct Answer: C) Flashlight. 51. What type of surface best reflects light? A) Dull. B) Shiny. C) Clear. D) Black. Show Answer Correct Answer: B) Shiny. 52. There are 11 letters in the word 'EXAMINATION'. How many letters of this word are not changed when the word is seen in a plane mirror? A) 8. B) 6. C) 9. D) 7. Show Answer Correct Answer: A) 8. 53. The mirror used by the doctors to examine eyes, nose, ears and throat is:- A) Concave. B) Real. C) Virtual. D) Convex. Show Answer Correct Answer: A) Concave. 54. This object dips in like a bowl A) Convex lens. B) Prism. C) Mirror. D) Concave lens. Show Answer Correct Answer: D) Concave lens. 55. The principal chemical compound that living things use to store energy is A) DNA. B) H$_{2}$O. C) ATP. D) CO$_{2}$. Show Answer Correct Answer: C) ATP. 56. An interesting feature of a ..... is that you will never see the same pattern again. A) Kaleidoscope. B) Telescope. C) Mirror. D) Periscope. Show Answer Correct Answer: A) Kaleidoscope. 57. What can be concluded from the passage about transforming energy from the Sun? A) Sunlight is made only from blue light. B) Sunlight cannot be transformed. C) Technology can be used to transform radiant energy. D) Light moves in compression waves. Show Answer Correct Answer: C) Technology can be used to transform radiant energy. 58. Maggie is observing a tree to see if the length of its shadow will change. Each hour, she traces the shadow outline with chalk. Which of the following would be the LEAST important while making her observations? A) Choosing a tree that gets a good amount of sunlight. B) Recording the time each shadow occurs. C) Measuring the length of the shadows. D) Observing the temperature outside. Show Answer Correct Answer: D) Observing the temperature outside. 59. Can you see objects in the dark? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 60. An image which cannot be obtain on a screen is called a A) Real image. B) Virtual image. C) Erect image. D) None of the above. Show Answer Correct Answer: B) Virtual image. ← 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 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 8Class 7 Science Chapter 11 Light Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books