This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 11 Light – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Light enters our eyes through the ..... A) Cornea. B) Iris. C) Pupil. D) Lens. Show Answer Correct Answer: C) Pupil. 2. What kind of image formed by concave lens? A) Virtual. B) Real. C) Both. D) None. Show Answer Correct Answer: A) Virtual. 3. To bounce off and go in the opposite directions A) Reflection. B) Refraction. C) Absorption. D) Transfer. Show Answer Correct Answer: A) Reflection. 4. When you are at a basketball game, what happens to the sound waves coming from the mouths of many people? A) Destructive interference. Each wave takes energy away from the sounds it combines with. B) Constructive interference:the waves "add" together to make a louder wave. C) James Benson's waves take over all other waves. D) The waves refract with each other and fall apart. Show Answer Correct Answer: B) Constructive interference:the waves "add" together to make a louder wave. 5. The rotation of the earth causes A) Lunar Eclipse. B) Solar Eclipse. C) Change in season. D) Day and night. Show Answer Correct Answer: D) Day and night. 6. LUNAR ECLIPSE IS A) SHADOW OF EARTH FALLING ON MOON. B) SHADOW OF MOON FALLING ON EARTH. C) SHADOW OF SUN FALLING ON EARTH. D) SHADOW OF SUN FALLING ON MOON. Show Answer Correct Answer: A) SHADOW OF EARTH FALLING ON MOON. 7. The number of images of an object placed between two mirrors inclined at an angle of45$^\circ$ are A) 2. B) 7. C) 5. D) 10. Show Answer Correct Answer: B) 7. 8. If white light shines on a green object A) It will reflect green light and absorb red and blue light. B) It will reflect Blue light and absorb red and green light. C) It will reflect red light and absorb green and blue light. D) It will reflect green and blue light and absorb red light. Show Answer Correct Answer: A) It will reflect green light and absorb red and blue light. 9. Growing more trees can increase noise pollution. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 10. Which side of a plane mirror, you will face, to see yourself? A) Polished surface. B) Reflecting surface. C) All the above. D) None of the above. Show Answer Correct Answer: B) Reflecting surface. 11. A converging lens has focal length of 15 cm. At what distance should the object be placed from the lens so that it forms an image at 30 cm from the lens A) + 60 cm. B) -30 cm. C) -60 cm. D) + 30 cm. Show Answer Correct Answer: B) -30 cm. 12. Type of mirror that can produce a virtual image ..... A) Plane. B) Convex. C) Concave. D) All of the above. Show Answer Correct Answer: D) All of the above. 13. The path of the light is A) Curved. B) A zig-zag line. C) Always a straight line. D) Depends on the medium. Show Answer Correct Answer: C) Always a straight line. 14. If a material transmits light, it is called transparent. A) True. B) False. C) Only on Mars. D) Sunlight does not do this. Show Answer Correct Answer: A) True. 15. Real images are always A) Erect. B) Inverted. C) Laterally inverted. D) Both b and c. Show Answer Correct Answer: B) Inverted. 16. Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size, whereas Paheli found her image erect and smaller in size. This means that the mirrors of Boojho and Paheli respectively are A) Plane mirror and concave mirror. B) Convex mirror and plane mirror. C) Plane mirror and convex mirror. D) Concave mirror and convex mirror. Show Answer Correct Answer: C) Plane mirror and convex mirror. 17. 9) Power of the lens is-40, its focal length is: A) 4 m. B) -40 m. C) -0.25 m. D) -25 m. Show Answer Correct Answer: C) -0.25 m. 18. This type of object lets some light through, but not all. It is not easy to see through this type of material. A) Transparent. B) Translucent. C) Co-paid. D) Opaque. Show Answer Correct Answer: B) Translucent. 19. If light falls perpendicularly on a plane mirror, what will be the angle in which it will be reflected? A) 45 degrees. B) 90 degrees. C) 180 degrees. D) 360 degrees. Show Answer Correct Answer: B) 90 degrees. 20. Light travels in ..... lines. A) Space. B) Directions. C) Bounces. D) Straight. Show Answer Correct Answer: D) Straight. 21. What is the approximate speed of light in vaccum in km/s? A) Three million. B) Three lakh. C) Three crore. D) Three thousand. Show Answer Correct Answer: B) Three lakh. 22. Which mirror has a wider field of view? A) Convex. B) Concave. C) Plane. D) None. Show Answer Correct Answer: A) Convex. 23. Light that humans can see is called the ..... spectrum. A) Ultraviolet. B) Infrared. C) Visible. D) Gamma ray. Show Answer Correct Answer: C) Visible. 24. Light behaves like both a particle and a ..... A) Mass. B) Wave. C) Current. D) None of the above. Show Answer Correct Answer: B) Wave. 25. You walk into a dark room. You need to be able to see. What can you do? A) Turn on a radio. B) Turn on a fan. C) Turn on a light. D) None of the above. Show Answer Correct Answer: C) Turn on a light. ← 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