This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Light > Class 7 Science Chapter 11 Light – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 20 (38 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. AN image formed on a screen is called as: A) Virtual image. B) Erect image. C) Real image. D) None of the above. Show Answer Correct Answer: C) Real image. 2. Which would you rather walk on barefoot if the sun is out all day long? A) Grass. B) Black top. C) Sand at the beach. D) Concrete sidewalk. Show Answer Correct Answer: A) Grass. 3. Who invented the Braille system? A) Helen Keller. B) Galileo Galilei. C) Alexandro Wolta. D) Louis Braille. Show Answer Correct Answer: D) Louis Braille. 4. Mirror reflection gives a ..... image. A) Dim. B) Clear. C) Dotted. D) Different. Show Answer Correct Answer: B) Clear. 5. Because we know that light with shorter waves and higher frequency has more energy, looking at the chart of visible light, which color should have the most energy? A) Red light. B) Not light has energy. C) Purple light(violet). D) Orange light. Show Answer Correct Answer: C) Purple light(violet). 6. A shadow is always black in colour. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. Where does dark reaction or light independent specifically occur? A) Grana. B) Stroma of the chloroplast. C) Thylakoid membrane. D) Nuclear membrane. Show Answer Correct Answer: B) Stroma of the chloroplast. 8. Convex Mirrors produce ..... A) Only virtual images. B) Only real images. C) Virtual or real images. D) Inverted images. Show Answer Correct Answer: A) Only virtual images. 9. What does NADPH do? A) Carries electrons to the Calvin cycle. B) Carries electrons to the ETC. C) All the above. D) None of the above. Show Answer Correct Answer: A) Carries electrons to the Calvin cycle. 10. The linear magnification produced by a spherical mirror is +3. Which of the following is correct? A) Image formed is real and inverted. B) Convex mirror is used. C) Image formed is virtual and enlarged. D) Image formed is in front of the mirror. Show Answer Correct Answer: C) Image formed is virtual and enlarged. 11. Because the light beam moves away from the vertical when the light moves from the compact media to the sparse media A) The speed of light is often reduced after. B) Does not change in the speed of light. C) The light speed is slowed down. D) The speed of light increases. Show Answer Correct Answer: D) The speed of light increases. 12. What type of image is formed by pinhole camera A) UNREAL. B) NONE. C) REAL. D) BOTH REAL AND UNREAL. Show Answer Correct Answer: C) REAL. 13. Number of images formed when an object is placed between two mirrors at 90 degree to each other A) 2. B) 3. C) 4. D) None. Show Answer Correct Answer: B) 3. 14. Which of the following rectangular glass slabs made from same material produces the largest lateral shift when a ray of light is incident at the same angle? A) 15 cm x 9 cm. B) 15 cm x 12 cm. C) 15 cm x 11 cm. D) 15 cm x 10 cm. Show Answer Correct Answer: B) 15 cm x 12 cm. 15. What color has the shortest wavelength, or the highest frequency? A) Red. B) Blue. C) Violet. D) Yellow. Show Answer Correct Answer: C) Violet. 16. What is a light source? A) A vibration. B) A shadow. C) The starting point of light. D) Our eyes. Show Answer Correct Answer: C) The starting point of light. 17. 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. 18. Matter that transmit light is ..... A) Opaque. B) Reflective material. C) Transluscent. D) Transparent. Show Answer Correct Answer: D) Transparent. 19. 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. 20. The essential things that are required for shadow formation are- A) A source of light, a transparent object, Screen. B) A source of light, an opaque object, Screen. C) A source of light, An Opaque object. D) A plane mirror, a transparent object. Show Answer Correct Answer: B) A source of light, an opaque object, Screen. 21. An inverted image can be seen in a convex mirror, A) When the distance of the object from the mirror is equal to the focal length of the mirror. B) Under no circumstances. C) When the object is at a distance equal to the radius of curvature of the mirror. D) When the object is very far from the mirror. Show Answer Correct Answer: B) Under no circumstances. 22. Which of the following mirror has infinite focal length. A) Converging mirror. B) Convex mirror. C) Concave mirror. D) Plane mirror. Show Answer Correct Answer: D) Plane mirror. 23. Choose an example of translucent object A) Glass. B) Bag. C) Wood. D) Coloured glass. Show Answer Correct Answer: D) Coloured glass. 24. 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. 25. 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. 26. ..... is one of the best reflectors of light. A) Brass. B) Silver. C) Aluminium. D) Gold. Show Answer Correct Answer: B) Silver. 27. Which of the following types of electromagnetic radiation has the shortest wavelengths? A) Radio waves. B) Visible light. C) Ultraviolet. D) Infrared. Show Answer Correct Answer: C) Ultraviolet. 28. ..... 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. 29. Which of the following is the correct sequence of colours in a rainbow? A) Red, orange, yellow, green, blue, indigo, violet. B) Violet, indigo, blue, green, yellow, orange, red. C) Red, orange, yellow, green, blue, indigo, white. D) Red, orange, yellow, green, indigo, blue, violet. Show Answer Correct Answer: A) Red, orange, yellow, green, blue, indigo, violet. 30. 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. 31. What is called a source of light? A) An object that can reflect light. B) An object that can emit light. C) An object that can refract light. D) An object that can absorb light. Show Answer Correct Answer: B) An object that can emit light. 32. Which of these describes how light travels through an empty space? A) It travels in a straight line without stopping. B) It travels straight but may change direction to avoid objects. C) It changes direction often even if there are no objects. D) It comes to a stop after it travels a certain distance. Show Answer Correct Answer: A) It travels in a straight line without stopping. 33. 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) 9 / 8. B) 8 / 9. C) 12 / 6. D) 6 / 12. Show Answer Correct Answer: B) 8 / 9. 34. 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. 35. Light travels ..... A) In circles. B) In waves. C) Around corners. D) In a straight line. Show Answer Correct Answer: D) In a straight line. 36. The magnification is negative for ..... A) Real image. B) Upright image. C) Erect image. D) Virtual image. Show Answer Correct Answer: A) Real image. 37. 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. 38. 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 QuizzesScience QuizzesClass 7 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books