This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 11 Light – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 25 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If an object allows most all light to pass through it then it is ..... A) Transparent. B) Opaque. C) Translucent. D) Cold. Show Answer Correct Answer: A) Transparent. 2. The height of the sound waves A) Frequency. B) Amplitude. C) Wavelength. D) None of the above. Show Answer Correct Answer: B) Amplitude. 3. A green house protect plants from weather and lets light in. What's the best type of material to make one? A) Transparent-allows some light through. B) Transparent-allows most light through. C) Translucent-allows most light through. D) Translucent-allows some light through. Show Answer Correct Answer: B) Transparent-allows most light through. 4. We can see things because light interacts with objects and ..... A) Is absorbed by them. B) Enters our eyes. C) Reflects from our eyes. D) Is colourless. Show Answer Correct Answer: B) Enters our eyes. 5. An enlarged and an erect image can be formed by? A) Only a convex mirror. B) Only a concave mirror. C) Only a plane mirror. D) Both convex and concave. Show Answer Correct Answer: B) Only a concave mirror. 6. Bouncing back of light is called A) Reflection. B) Refraction. C) All the above. D) None of the above. Show Answer Correct Answer: A) Reflection. 7. A concave mirror always form a real image.(T/F) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 8. The bouncing off of light rays from the surface of an object such as a mirror or other shiny surface is called: A) Mirror. B) Laser. C) Reflection. D) Refraction. Show Answer Correct Answer: C) Reflection. 9. Why opaque materials can form a dark shadow? A) Because they let most light to pass through it. B) Because they let some light and block some light to pass through it. C) Because they block all of the light to pass through it. D) None of the above. Show Answer Correct Answer: C) Because they block all of the light to pass through it. 10. The bending of light as it travels from one medium to another medium of different densities. A) Reflection. B) Refraction. C) Interference. D) Diffraction. Show Answer Correct Answer: B) Refraction. 11. Why do we see a blue car? A) Because the car is transparent. B) Because it reflects the colour blue and absorbs the rest of the colours. C) Because it absorbs the colour blue and reflects the rest of the colours. D) Because all of the colours are absorbed. Show Answer Correct Answer: B) Because it reflects the colour blue and absorbs the rest of the colours. 12. What is the principal of PINHOLE CAMERA? A) NO PROPAGATION. B) RECTILINAR PRINCIPLE. C) RECTILINER PROPAGATION. D) NONE OF THESE. Show Answer Correct Answer: C) RECTILINER PROPAGATION. 13. If you are using a red color filter, blue objects will appear what color? A) Purple. B) Blue. C) Red. D) Black. Show Answer Correct Answer: D) Black. 14. What is true about Plane mirror? A) The image formed by a plane mirror is always virtual and erect. B) It shows lateral inversion. C) The distance of the object from the mirror is equal to the distance of the image from the mirror, that is, image distance is equal to object distance. D) All the above. Show Answer Correct Answer: D) All the above. 15. When a ray of light travels from one medium to another, which of the following factor does not changes A) Speed. B) Velocity. C) Momentum. D) Frequency. Show Answer Correct Answer: D) Frequency. 16. A part of the retina that does not have any rods and cones and is insensitive to light is A) Cornea. B) Lens. C) Iris. D) Blind spot. Show Answer Correct Answer: D) Blind spot. 17. What do you call a flat mirror? A) Plane mirror. B) Convex mirror. C) Concave mirror. D) None of the above. Show Answer Correct Answer: A) Plane mirror. 18. In which of the following cases distance between object and its image formed will be zero A) When object is placed at center of curvature of convex mirror. B) When object is placed at center of curvature of concave mirror. C) When object is placed at focal point of concave mirror. D) When object is placed between center of curvature and focal point of concave mirror. Show Answer Correct Answer: B) When object is placed at center of curvature of concave mirror. 19. As the angle between two plane mirrors is decreases gradually, the number of images of an object placed between them A) Increases gradually. B) Decreases gradually. C) First increases then decreases. D) First decreases then increases. Show Answer Correct Answer: A) Increases gradually. 20. What is the name of effect that gives the sky its blue colour A) Tyndall effect. B) Spectrum effect. C) Wavelength eeffect. D) None of the above. Show Answer Correct Answer: A) Tyndall effect. 21. Some students paint the inside of several boxes. They paint each box a different color. They observe that the inside of the box painted white looks brighter than the others. What is the most likely reason this box looks brighter? (5.6C) A) More light is reflected off white paint. B) More light is refracted by white paint. C) More light passes through white paint. D) More light is absorbed by white paint. Show Answer Correct Answer: A) More light is reflected off white paint. 22. When light bends as it travels from one medium to another A) Absorbs. B) Echos. C) Reflects. D) Refracts. Show Answer Correct Answer: D) Refracts. 23. Where does the light independent reaction take place? A) Matrix. B) Stroma. C) Thylakoid membrane. D) Cytoplasm. Show Answer Correct Answer: B) Stroma. 24. What is a stream of light called? A) Ray. B) Beam. C) Twilight. D) Sunlight. Show Answer Correct Answer: A) Ray. 25. An image that forms where light seems to come from a point but light rays don't actually meet is a A) Virtual image. B) Real image. C) Inverted Image. D) Clear image. Show Answer Correct Answer: A) Virtual image. ← 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