This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 11 Light – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 18 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the use of light house? A) It guides the sailors. B) It guides the scientist. C) It gives the light. D) None of the above. Show Answer Correct Answer: A) It guides the sailors. 2. Which color has the longest wavelength? A) Violet. B) Red. C) Green. D) Blue. Show Answer Correct Answer: B) Red. 3. A medium that allows ALL light to pass through A) Transparent. B) Translucent. C) Opaque. D) Liquid. Show Answer Correct Answer: A) Transparent. 4. An opaque object stops the light completely, therefore, it casts a dark shadow. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 5. (A) Warnings are often found in car mirrors.(B) Convex mirrors show objects closer than they appear. A) Both (A) and (B) are true and (B) is a correct explanation for (A). B) Both (A) and (B) are true but (B) is not a correct explanation for (A). C) (A) is true but (B) is false. D) (B) is true but (A) is false. Show Answer Correct Answer: C) (A) is true but (B) is false. 6. Which of the following is a reflector of light? A) A) The sun. B) B) The moon. C) C) The star. D) D ) Fire. Show Answer Correct Answer: B) B) The moon. 7. A lamp with a Color Rendering Index of ..... would be appropriate for displaying products at a retail store. A) 1. B) 30. C) 50. D) 90. Show Answer Correct Answer: D) 90. 8. A rainbow is formed through refraction. (They both start with R!) What happen to the white light when it travels through the medium-the rain drop? A) The light scatters. B) The light is absorbed. C) The different colors of light are bent at different angles due to their speeds. D) ROYGBIV gets mixed up. Show Answer Correct Answer: C) The different colors of light are bent at different angles due to their speeds. 9. The object and image distance of a lens are-40 cm and-20 cm respectively then the magnification of lens is A) -0.25. B) + 0.25. C) -0.5. D) + 0.5. Show Answer Correct Answer: D) + 0.5. 10. Which of these things can NOT create light? A) Light bulb. B) Fireflies. C) Plastic. D) None of the above. Show Answer Correct Answer: C) Plastic. 11. An object that separates white light into all the colors. A) Microscope. B) Prism. C) Shadow. D) Telescope. Show Answer Correct Answer: B) Prism. 12. If the angle of incidence of light falling on a plane mirror is 30$^\circ$, what will be the angle of reflection? A) 60$^\circ$. B) 30$^\circ$. C) 55$^\circ$. D) 40$^\circ$. Show Answer Correct Answer: B) 30$^\circ$. 13. The following is required for a shadow to form A) Source of light. B) Screen. C) An opaque object. D) All of these. Show Answer Correct Answer: D) All of these. 14. Is Moon is a luminous object(which emit their own light)? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 15. Moon is a not a light source because it borrows light from the sun. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 16. The inner surface of a steel spoon acts as a ..... mirror. A) Plane mirror. B) Convex mirror. C) Concave mirror. D) Convex lens. Show Answer Correct Answer: C) Concave mirror. 17. When Earth comes between Sun and Moon it causes A) Solar Eclipse. B) Lunar Eclipse. C) All the above. D) None of the above. Show Answer Correct Answer: B) Lunar Eclipse. 18. When light hits an opaque object it changes directionand bounces off. This is called ..... A) Refraction. B) Reflection. C) All the above. D) None of the above. Show Answer Correct Answer: B) Reflection. 19. The three primary colors of light are A) Red, Blue, Yellow. B) Pink, Green, Blue. C) Violet, Green, Red. D) Blue, Green, Red. Show Answer Correct Answer: D) Blue, Green, Red. 20. If the sun is towards your left, your shadow will be formed towards your A) Left. B) Right. C) Back. D) Shadow will not be formed. Show Answer Correct Answer: B) Right. 21. What is the difference between reflection and refraction? A) Reflection is the bouncing back of light; refraction is the bending of light. B) Reflection and refraction are the same phenomenon. C) Reflection is the bending of light; refraction is the bouncing back of light. D) Reflection occurs only in water; refraction occurs in air. Show Answer Correct Answer: A) Reflection is the bouncing back of light; refraction is the bending of light. 22. No shadow is formed when light passes through an object. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. Sources of light are A) Natural. B) Artificial. C) Both a and b. D) None. Show Answer Correct Answer: C) Both a and b. 24. Paper kept under a magnifying glass burns because A) Diverging of sunlight. B) Converging of sunlight. C) Reflection of sunlight. D) Dispersion of sunlight. Show Answer Correct Answer: B) Converging of sunlight. 25. Colors that bend the most have longer wavelength A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. ← 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