This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 11 Light – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Shadows do not depend on the ..... of the object. A) Size. B) Colour. C) Shape. D) Light. Show Answer Correct Answer: B) Colour. 2. What are opaque objects? A) Objects that cannot let light pass through. B) Objects that can let little light pass through. C) Objects that can let light pass through. D) None of the above. Show Answer Correct Answer: A) Objects that cannot let light pass through. 3. When all of the colors of light are absorbed, we see the color ..... A) White. B) Green. C) Black. D) Red. Show Answer Correct Answer: C) Black. 4. What is needed to cast a shadow? A) Translucent or Opaque object. B) All of these. C) Screen. D) Source of light. Show Answer Correct Answer: B) All of these. 5. Unpleasant and loud sound can cause A) Sleeping disorders. B) Hearing problems. C) Aggression in animals. D) All of the above. Show Answer Correct Answer: D) All of the above. 6. An example of opaque. A) Metal spoon. B) Wax paper. C) Window. D) Frosted glass. Show Answer Correct Answer: A) Metal spoon. 7. How can a fire truck send a message to other cars that they can see? A) It has sirens. B) It has flashing lights. C) It has a horn. D) None of the above. Show Answer Correct Answer: B) It has flashing lights. 8. If red light and green light are shone onto a white surface, it will appear ..... A) It will appear white. B) It will appear magenta. C) It will appear green. D) It will appear cyan. E) It will appear yellow. Show Answer Correct Answer: E) It will appear yellow. 9. A shadow is formed because light travels in a straight line. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. If you are wearing a black sweatshirt, what happens to most of the light that strikes the sweatshirt A) It is absorbed. B) It is reflected. C) It is transmitted. D) None of the above. Show Answer Correct Answer: A) It is absorbed. 11. A full length image of a distance tall building can definitely be seen by using A) A concave mirror. B) A convex mirror. C) A plane mirror. D) Both palane and concave mirror. Show Answer Correct Answer: B) A convex mirror. 12. If a material does not let any light go through, that material is called ..... A) Transmitted. B) Translucent. C) Absorbent. D) Opaque. Show Answer Correct Answer: D) Opaque. 13. Light travel fastest in A) Water. B) Air. C) Glass. D) Diamond. Show Answer Correct Answer: B) Air. 14. The image of an object retains on the retina for about ..... of the second even after the object has disappeared from our view. A) 1/16 th. B) 1/15 th. C) 1/10 th. D) 1/ 17 th. Show Answer Correct Answer: A) 1/16 th. 15. A VERY NARROW PATH OF LIGHT IS A) RAY. B) BEAM. C) SHOWER. D) LINE. Show Answer Correct Answer: A) RAY. 16. The distance between the object and its image formed by a plane mirror appears to be 24 cm. What is the distance between the mirror and the object? A) 24 cm. B) 20 cm. C) 12 cm. D) 10 cm. Show Answer Correct Answer: C) 12 cm. 17. What is visible light used in? A) Light Bulbs, TVs, Lasers. B) Nothing, Visible light cannot be used. C) Sound. D) When we Breathe. Show Answer Correct Answer: A) Light Bulbs, TVs, Lasers. 18. The energy of an electromagnetic wave is related to its frequency. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. A person 1m in front of a plain mirror seeems ot be ..... m away from his image A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 20. Shiny and smooth surfaces dont reflect much light A) True. B) False, the dull surfaces dont reflect much light. C) All the above. D) None of the above. Show Answer Correct Answer: B) False, the dull surfaces dont reflect much light. 21. The taking in of light energy by an object A) Compression. B) Reflection. C) Refraction. D) Absorption. Show Answer Correct Answer: D) Absorption. 22. The refractive index assumes the entrance of light from A) Glass. B) Water. C) Vaccum. D) Air. Show Answer Correct Answer: C) Vaccum. 23. You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens. To obtain an enlarged image of an object you can use either A) Concave mirror or convex mirror. B) Concave mirror or convex lens. C) Concave mirror or concave lens. D) Concave lens or convex lens. Show Answer Correct Answer: B) Concave mirror or convex lens. 24. The size of the pupil of the eye is adjusted by A) Cornea. B) Ciliary muscle. C) Optic nerve. D) Iris. Show Answer Correct Answer: D) Iris. 25. Requires light to occur. Light independent or light dependent 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. ← PreviousNext →Related 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 8Class 7 Science Chapter 11 Light Quiz 9Class 7 Science Chapter 11 Light Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books