This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 11 Light – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Twinkling of stars is due to atmospheric A) Dispersion of light by water droplets. B) Refraction of light by different layers of varying refractive indices. C) Scattering of light by dust particles. D) Internal reflection of light by clouds. Show Answer Correct Answer: B) Refraction of light by different layers of varying refractive indices. 2. What does dark mean? A) The night. B) Absence of light. C) Too much light. D) The Moon. Show Answer Correct Answer: B) Absence of light. 3. Bouncing of light A) Refraction. B) Reflection. C) Dispersion. D) None. Show Answer Correct Answer: B) Reflection. 4. 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. 5. 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. 6. Represents the range of colors you see when light is divided by a prism. A) Heat. B) Water. C) Spectrum. D) Stars. Show Answer Correct Answer: C) Spectrum. 7. Sun is a ..... object. A) Translucent. B) Luminous. C) Opaque. D) Non-Luminous. Show Answer Correct Answer: B) Luminous. 8. 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. 9. 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. 10. 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. 11. Which has less energy than visible light? A) Radio waves. B) Gamma rays. C) X-Rays. D) UV light. Show Answer Correct Answer: A) Radio waves. 12. Example of a luminous object is A) Sun. B) Book. C) Wall. D) Door. Show Answer Correct Answer: A) Sun. 13. Paper A) Regular reflection. B) Diffused reflection. C) All the above. D) None of the above. Show Answer Correct Answer: B) Diffused reflection. 14. A person suffering from ..... can see nearby objects but cannot see distant objects clearly. A) Myopia. B) Hypermatropia. C) Cataract. D) Presbyopia. Show Answer Correct Answer: A) Myopia. 15. Why are convex mirrors used by drivers as rear view mirrors in vehicles? A) They reflect light better than other mirrors. B) They produce images which are clearer than those produced by others. C) They produce magnified images. D) They give a wide field of view. Show Answer Correct Answer: D) They give a wide field of view. 16. Which of the following is another way of transforming energy from the Sun? A) Planets move around the Sun. B) Sunlight makes us feel happy. C) Plants use sunlight for photosynthesis to make food. D) Sunlight helps us see during the day. Show Answer Correct Answer: C) Plants use sunlight for photosynthesis to make food. 17. 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. 18. Why can you see most objects? A) They emit light. B) Light refracts through them. C) Light reflects off them. D) They absorb light. Show Answer Correct Answer: C) Light reflects off them. 19. When the surface of a mirror curves inward, like the inside of a bowl, it is called a A) Plane Mirror. B) Convex Mirror. C) Concave Mirror. D) Diffuse Mirror. Show Answer Correct Answer: C) Concave Mirror. 20. 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. 21. *The organelle responsible for photosynthesis: A) Vacuole. B) Chloroplast. C) Nuclear membrane. D) Mitochondria. E) Cytoplasm. Show Answer Correct Answer: B) Chloroplast. 22. Shadows are longest in the ..... A) Evening. B) Afternoon. C) Morning. D) Night. Show Answer Correct Answer: C) Morning. 23. Which of the following is NOT a characteristic feature of a convex mirror? A) The image is virtual. B) The image is diminished in size. C) The image is erect. D) The image is real. Show Answer Correct Answer: D) The image is real. 24. What color do we see when all light is absorbed? A) Red. B) Black. C) White. D) Rainbow. Show Answer Correct Answer: B) Black. 25. 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 stops. B) It is decreasing. C) It is increasing. D) T does not change. Show Answer Correct Answer: B) It is decreasing. ← 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 8Class 7 Science Chapter 11 Light Quiz 9Class 7 Science Chapter 11 Light Quiz 10Class 7 Science Chapter 11 Light Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books