This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 11 Light – Quiz 43 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 43 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A spherical mirror and a thin spherical lens have each a focal length of-15cm. The mirror and the lens are likely to be A) Both concave. B) Both convex. C) The mirror is concave and the lens is convex. D) The mirror is convex, but the lens is concave. Show Answer Correct Answer: A) Both concave. 2. Lens that is thicker in the middle and thinner at the edges A) Reflection. B) Refraction. C) Concave. D) Convex. Show Answer Correct Answer: D) Convex. 3. If an object is placed 45 cm from a convex lens. The object placed at a distance 90 cm, then it's focal length is A) + 30 cm. B) -30 cm. C) + 10 cm. D) -10 cm. Show Answer Correct Answer: A) + 30 cm. 4. ..... is formed because ..... travels in a straight line A) Light, shadow. B) Shadow, light. C) Not sure. D) None of the above. Show Answer Correct Answer: B) Shadow, light. 5. If you stand in front of two adjacent large mirrors at 90$^\circ$ angle, how many images will you see? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 6. Light can both reflect (bounce) and refract (bend) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. What is the principal axis? A) A line which passes through the centre of a mirror. B) A line along which the focal length is measured. C) All of the above. D) None of the above. Show Answer Correct Answer: C) All of the above. 8. When we look into a glass mirror, light ..... A) Bends as it passes through. B) Bounces back in a random order. C) Hits the mirror and is absorbed. D) Bounces back at the same angle it strikes the mirror at. Show Answer Correct Answer: D) Bounces back at the same angle it strikes the mirror at. 9. The moon does not have light of its own. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. Plural form of leaf A) Leafs. B) Leaves. C) Leafes. D) None of the above. Show Answer Correct Answer: B) Leaves. 11. Which of the following describes the image formed by a plane mirror? A) Real, upright, same size as the object. B) Real, inverted, and reduced. C) Virtual, upright, & same size as the object. D) Virtual, inverted and enlarged. Show Answer Correct Answer: C) Virtual, upright, & same size as the object. 12. A mirror, water, and foil would all reflect light. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. What is an image? A) The impression of the object created by the light on the mirror. B) The impression of the object on a paper. C) The impression of the object created by the sound on the mirror. D) None of the above. Show Answer Correct Answer: A) The impression of the object created by the light on the mirror. 14. A material that allows light to pass through it. A) Opaque. B) Translucent. C) Transparent. D) Prism. Show Answer Correct Answer: C) Transparent. 15. When light bounces off another object at an angle A) Refraction. B) Reflection. C) Spectrum. D) Transparent. Show Answer Correct Answer: B) Reflection. 16. A prism is an object that A) Separates wavelenghts. B) Refracts light. C) Separates white light into bands of colored light. D) None of the above. Show Answer Correct Answer: C) Separates white light into bands of colored light. 17. Which of the following are used in projectors? A) Concave lens. B) Convex mirrors. C) Plane mirrors. D) Convex lenses. Show Answer Correct Answer: D) Convex lenses. 18. Light travels at the speed of ..... A) 30, 000 km/s. B) 1200 per min. C) 35000 per hour. D) 72 sec. Show Answer Correct Answer: A) 30, 000 km/s. 19. Which of the following is true about convex lens? A) Buldged outwards at the middle. B) Converging nature. C) Produces both real and virtual images. D) All of the above. Show Answer Correct Answer: D) All of the above. 20. Butter (tracing) paper is ..... which will let some light pass through it. A) Translucent. B) Transparent. C) Opaque. D) Light. Show Answer Correct Answer: A) Translucent. 21. What is the earth's primary source of light energy? A) Moon. B) Sun. C) Waves. D) Fire. Show Answer Correct Answer: B) Sun. 22. Spinning of Earth on its axis is A) Rotation. B) Revolution. C) All the above. D) None of the above. Show Answer Correct Answer: A) Rotation. 23. Why does the Moon shine at night? A) It is creating light. B) It is a light source. C) It reflects the Sun's light. D) It doesn't shine at night. Show Answer Correct Answer: C) It reflects the Sun's light. 24. To make a kaleidoscope we require ..... A) Three plane mirrors. B) Four plane mirrors. C) Three glass sheets. D) Four glass sheets. Show Answer Correct Answer: A) Three plane mirrors. 25. Example of natural source of light A) Sun, stars. B) Torch, candle. C) All of them. D) Only sun. Show Answer Correct Answer: A) Sun, stars. ← 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