This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 11 Light – Quiz 50 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 50 (23 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is a light source? A) The starting point of light. B) A shadow. C) A vibration. D) Our eyes. Show Answer Correct Answer: A) The starting point of light. 2. Coloured glass is an example of a ..... object. A) Transparent. B) Translucent. C) Opaque. D) None of the above. Show Answer Correct Answer: B) Translucent. 3. A virtual image(a) can be formed on the screen(b) cannot be formed on the screen(c) is formed only by a plane mirror(d) is formed only by the convex mirror A) A. B) B. C) C. D) D. Show Answer Correct Answer: B) B. 4. Matter that transmit light is ..... A) Opaque. B) Transparent. C) Transluscent. D) Reflective material. Show Answer Correct Answer: B) Transparent. 5. At what time the sun is at lowest position? A) Noon. B) Afternoon. C) One. D) None of the above. Show Answer Correct Answer: B) Afternoon. 6. The essential things that are required for shadow formation are- A) A source of light, a transparent object, Screen. B) A plane mirror, a transparent object. C) A source of light, an opaque object, Screen. D) A source of light, An Opaque object. Show Answer Correct Answer: C) A source of light, an opaque object, Screen. 7. An inverted image can be seen in a convex mirror, A) Under no circumstances. B) When the object is very far from the mirror. C) When the object is at a distance equal to the radius of curvature of the mirror. D) When the distance of the object from the mirror is equal to the focal length of the mirror. Show Answer Correct Answer: A) Under no circumstances. 8. Which of the following mirror has infinite focal length. A) Concave mirror. B) Convex mirror. C) Converging mirror. D) Plane mirror. Show Answer Correct Answer: D) Plane mirror. 9. Choose an example of translucent object A) Wood. B) Glass. C) Coloured glass. D) Bag. Show Answer Correct Answer: C) Coloured glass. 10. Which of the following is not needed to start the light reaction A) H2O. B) ADP + P. C) CO2. D) None of the above. Show Answer Correct Answer: C) CO2. 11. What is the best description of a translucent material? A) No light passes through the material. B) Some light passes through the material. C) All light passes through the material. D) None of the above. Show Answer Correct Answer: B) Some light passes through the material. 12. ..... is one of the best reflectors of light. A) Gold. B) Silver. C) Brass. D) Aluminium. Show Answer Correct Answer: B) Silver. 13. Which of the following types of electromagnetic radiation has the shortest wavelengths? A) Infrared. B) Ultraviolet. C) Visible light. D) Radio waves. Show Answer Correct Answer: B) Ultraviolet. 14. ..... is the change of direction of light that is falling on the mirror. A) Direction. B) Conversion. C) Reflection. D) None of these. Show Answer Correct Answer: C) Reflection. 15. Which of the following is the correct sequence of colours in a rainbow? A) Red, orange, yellow, green, blue, indigo, violet. B) Red, orange, yellow, green, blue, indigo, white. C) Red, orange, yellow, green, indigo, blue, violet. D) Violet, indigo, blue, green, yellow, orange, red. Show Answer Correct Answer: A) Red, orange, yellow, green, blue, indigo, violet. 16. Does light travel slower in air or water? A) Air. B) Water. C) All the above. D) None of the above. Show Answer Correct Answer: B) Water. 17. What is called a source of light? A) An object that can absorb light. B) An object that can reflect light. C) An object that can refract light. D) An object that can emit light. Show Answer Correct Answer: D) An object that can emit light. 18. Which of these describes how light travels through an empty space? A) It travels straight but may change direction to avoid objects. B) It changes direction often even if there are no objects. C) It comes to a stop after it travels a certain distance. D) It travels in a straight line without stopping. Show Answer Correct Answer: D) It travels in a straight line without stopping. 19. 10) The refractive index of glass with respect to air is 3/2 and refractive index of water with respect to air is 4/3. What will be the refractive index of water with respect to glass? A) 12 / 6. B) 8 / 9. C) 9 / 8. D) 6 / 12. Show Answer Correct Answer: B) 8 / 9. 20. The reciprocal of the focal length is defined as A) Mirror formula. B) Lens formula. C) Power formula. D) Magnification formula. Show Answer Correct Answer: C) Power formula. 21. The magnification is negative for ..... A) Virtual image. B) Real image. C) Erect image. D) Upright image. Show Answer Correct Answer: B) Real image. 22. Image formed by a convex ..... is always virtual and smaller in size. A) Lens. B) Mirror. C) All the above. D) None of the above. Show Answer Correct Answer: B) Mirror. 23. Convex mirror is used as side view mirror of vehicle because A) Provides wider field of view. B) Gives erect image. C) Produces diminished image. D) All of the above. Show Answer Correct Answer: D) All of the above. ← PreviousRelated 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