This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Light > Class 7 Science Chapter 11 Light – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When was the longest solar eclipse of this century seen? A) March 8, 2014. B) May 9, 2007. C) July 30, 2000. D) January 15, 2010. Show Answer Correct Answer: D) January 15, 2010. 2. The method of indicating the amount caused by the change of light direction in relation to the two mediums given A) Rhythmic. B) Relative refraction. C) Refractive index. D) Refraction. Show Answer Correct Answer: C) Refractive index. 3. *Photosynthesis is a type of anabolic and exergonic reaction. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 4. What is reflection? A) Reflection is the absorbing of light off the surface that it strikes on. B) Reflection is the bouncing of light off the surface that it strikes on. C) Reflection is the scattering of light off the surface that it strikes on. D) Reflection is the bending of light off the surface that it strikes on. Show Answer Correct Answer: B) Reflection is the bouncing of light off the surface that it strikes on. 5. Which of the following is not a property of the image formed by a [lane mirror? A) Virtual and erect. B) Object size = image size. C) Object distance = image distance. D) Real and inverted. Show Answer Correct Answer: D) Real and inverted. 6. How are we able to see the color white? A) All colors except red are absorbed. B) All colors are absorbed. C) All colors are reflected. D) All colors except red are reflected. Show Answer Correct Answer: C) All colors are reflected. 7. When distance of object from a mirror is gradually increased then image formed by it becomes inverted which was erect in the beginning. Which type of mirror is this? A) Plane mirror. B) Concave mirror. C) Convex mirror. D) None of the above. Show Answer Correct Answer: B) Concave mirror. 8. Which wavelength of visible light has the lowest energy? A) Orange. B) Red. C) Blue. D) Yellow. Show Answer Correct Answer: B) Red. 9. The ..... is a device that produces beautiful patterns when it is rotated because of the multiple reflection of light. A) Microscope. B) Kaleidoscope. C) Periscope. D) Telescope. Show Answer Correct Answer: B) Kaleidoscope. 10. Our eyes perceive colors because of differences in which of the following properties of light? A) Source. B) Angle. C) Wavelength. D) Intensity. Show Answer Correct Answer: C) Wavelength. 11. Choose the statement that best describes light reaction. A) It converts CO2 to sugar molecule. B) It converts light energy to chemical energy of ATP and NADPH. C) It takes place in the stroma. D) None of the above. Show Answer Correct Answer: B) It converts light energy to chemical energy of ATP and NADPH. 12. Caleb is sitting near the window on a sunny day. When he closes the curtain, the room becomes darker. What property of the curtain allows it to make the room darker? A) The curtain folds easily. B) The curtain is rectangular shape. C) The curtain is brightly colored. D) The curtain absorbs light. Show Answer Correct Answer: D) The curtain absorbs light. 13. What word means to bend light rays away from each other? A) Virtual Light. B) Diverging light. C) Converging light. D) Real Light. Show Answer Correct Answer: B) Diverging light. 14. If the radius of curvature of a lens is 40 cm, then then the focal length of lens is A) 20. B) 40. C) 10. D) 60. Show Answer Correct Answer: A) 20. 15. How you can see above head object with out lifting head? A) Kaleidoscope. B) Pin hole camera. C) Periscope. D) Opthalomoscope. Show Answer Correct Answer: C) Periscope. 16. Which statement is not something that makes an aircraft lighter than air aircraft? A) Part of aircraft is filled with a gas that is lighter than air (helium hydrogen). B) Supported by the flow of the air over the lifting surfaces (wings). C) Heat the inside to a high temperature. D) None of the above. Show Answer Correct Answer: B) Supported by the flow of the air over the lifting surfaces (wings). 17. The change in the converging power of an eye lens is caused by the action of A) Optic nerve. B) Iris. C) Ciliary muscles. D) Retina. Show Answer Correct Answer: C) Ciliary muscles. 18. The spreading of light as it enters the opening of a barrier. A) Interference. B) Reflection. C) Refraction. D) Diffraction. Show Answer Correct Answer: D) Diffraction. 19. We are able to see objects because they ..... light into our eyes. A) Reflect. B) Shine. C) Defract. D) Refract. Show Answer Correct Answer: A) Reflect. 20. What kind of objects make shadows? A) Our hands. B) Trees. C) Animals. D) All of the above. Show Answer Correct Answer: D) All of the above. 21. As the name suggests, images are inversed, i.e. the right part of an object appears on the left in its images, and the left part of the object appears to the right. This phenomenon is called ..... A) Pneumonoultramicroscopicsilicovolcanoconiosis ( silicosis ). B) Lateral Inversion. C) Refraction. D) Bonding. Show Answer Correct Answer: B) Lateral Inversion. 22. The image formed by convex mirror is virtual, erect, and is formed between 'P' and 'C' A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. Light travels faster than sound- A) Correct. B) Incorrect. C) Speed is same in both. D) None of the above. Show Answer Correct Answer: A) Correct. 24. Which one is not a source of light? A) Stars. B) Sun. C) Firefly. D) Planets. Show Answer Correct Answer: D) Planets. 25. ..... objects form dark shadows. A) Transparent. B) Translucent. C) Opaque. D) None of the above. Show Answer Correct Answer: C) Opaque. 26. Sky Looks blue because of? A) Refraction Of light. B) Refraction 0f light. C) Scattering Of light. D) Scattering 0f light. Show Answer Correct Answer: C) Scattering Of light. 27. Which of the following would not reflect light? A) Mirror. B) Water. C) Glasses. D) Brick Wall. Show Answer Correct Answer: D) Brick Wall. 28. If angle of incidence is equal to 50 degrees, then calculate the angle between the incident ray and the reflected ray. A) 80 degrees. B) 50 degree. C) 100 degrees. D) 130 degrees. Show Answer Correct Answer: C) 100 degrees. 29. Reflection is when ..... A) Light bends. B) A shadow is created. C) Light is absorbed. D) Light hits and then bounces off a surface. Show Answer Correct Answer: D) Light hits and then bounces off a surface. 30. At the junction of the optic nerve and the retina, no vision is possible because of no sensory cells at that spot. Name that spot. A) Suspensory spot. B) Sensory spot. C) Junction spot. D) Blind spot. Show Answer Correct Answer: D) Blind spot. 31. Black Paper is a transparent object. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 32. Sunlight contains all visible wavelengths of light. Each wavelength is a different color. When sunlight passes into and out of a raindrop, the light rays bend. Which color of light bends the most? A) Blue. B) Orange. C) Red. D) Green. Show Answer Correct Answer: A) Blue. 33. Newton's Disk works on when all colours A) Mixes. B) Grinds. C) Nothing. D) None of the above. Show Answer Correct Answer: A) Mixes. 34. Bends light rays inward towards a focal point. A) Concave lens. B) Reflect. C) Refract. D) Convex lens. Show Answer Correct Answer: D) Convex lens. 35. What happens if there are no light sources? A) We can't hear anything. B) It gets very bright. C) Everything goes invisible. D) It becomes so dark that we can't see. Show Answer Correct Answer: D) It becomes so dark that we can't see. 36. The near point for a normal eye is A) 25 cm. B) 30 cm. C) Infinite. D) 10 cm. Show Answer Correct Answer: A) 25 cm. 37. The Object that do not allow any light to pass through them is called A) Transparent Object. B) Opaque Object. C) Translucent Object. D) Shadow. Show Answer Correct Answer: B) Opaque Object. 38. MATERIALS WHICH DO NOT ALLOW LIGHT TO PASS ARE CALLED A) OPAQUE OBJECTS. B) TRANSPARENT OBJECTS. C) TRANSLUCENT OBJECTS. D) None of the above. Show Answer Correct Answer: A) OPAQUE OBJECTS. 39. A shopkeeper wants to keep an eye on his store in order to prevent shoplifting. What could the shopkeeper hang on the wall in order to see a wider image of his store and his customers? A) A convex mirror. B) A convex lens. C) A concave mirror. D) A concave lens. Show Answer Correct Answer: A) A convex mirror. 40. Materials that let some light rays pass through but scatter some of the other rays A) Wood. B) Translucent. C) Transparent. D) Opaque. Show Answer Correct Answer: B) Translucent. 41. What kind of path does light take? A) It travels in a straight line until it hits something or goes through it. B) It bounces off all objects. C) It curves around all objects. D) It goes through all objects. Show Answer Correct Answer: A) It travels in a straight line until it hits something or goes through it. 42. Of the visible spectrum, what color has the longest wavelength? A) Blue. B) Yellow. C) Green. D) Red. E) Violet. Show Answer Correct Answer: D) Red. 43. A man is suffering from myopia. which of the following statements holds true for him? A) He can correct this defect by using convex lenses. B) He is not able to see the nearby objects clearly. C) This defect can only be treated surgically or through laser. D) He wears spectacles with concave lenses of appropriate focal length. Show Answer Correct Answer: D) He wears spectacles with concave lenses of appropriate focal length. 44. The mirror which forms virtual, erect and magnified image is ..... A) Diverging mirror. B) Convex mirror. C) Plane mirror. D) Converging mirror. Show Answer Correct Answer: D) Converging mirror. 45. How much does IdeaPad Slim 5i weights? A) 1.4Kg. B) 1.8Kg. C) 1.6kg. D) 1.5Kg. Show Answer Correct Answer: C) 1.6kg. 46. Light is able to pass through ..... materials A) Dull. B) Transparent. C) Shiny. D) Opaque. Show Answer Correct Answer: B) Transparent. 47. Why are you able to see yourself when you look in the mirror? A) Light bends as it hits the mirror. B) Light travels through the mirror. C) The mirror reflects the light. D) The mirror absorbs the light. Show Answer Correct Answer: C) The mirror reflects the light. 48. Which optical instrument can be best used to show multiple reflection? A) Eye glasses. B) Periscope. C) Kaleidoscope. D) Mirror. Show Answer Correct Answer: C) Kaleidoscope. 49. Which of the following uses light to help keep boats safe near land? A) Cell phone. B) Radio. C) Lighthouse. D) None of the above. Show Answer Correct Answer: C) Lighthouse. 50. The angle of reflection is equal to the angle of incidence. A) Always. B) Never. C) Under special case. D) Sometimes. Show Answer Correct Answer: A) Always. 51. Which of the following colors is not absorbed by chlorophyll pigments? A) Green. B) Blue. C) Violet. D) None of the above. Show Answer Correct Answer: A) Green. 52. The shadow gets ..... when screen is moved away. A) Smaller. B) Darker. C) Larger. D) No shadow. Show Answer Correct Answer: C) Larger. 53. The screen on which the image is formed A) Iris. B) Cornea. C) Pupil. D) Retina. Show Answer Correct Answer: D) Retina. 54. *It is used as a rear-view to see large area in a smaller frame A) Plane mirror. B) Convex Mirror. C) Option D. D) Convex lens. Show Answer Correct Answer: B) Convex Mirror. 55. ..... is a semiconductor diode that emits light when a voltage is applied to it and that is used especially in electronic devices. A) Light Emitting Diode (LED). B) Incandescent. C) Metal Halide. D) Fluorescent. Show Answer Correct Answer: A) Light Emitting Diode (LED). 56. The refractive indices of glass and water with respect to air are 3/2 and 4/3 respectively. If the speed of light in glass is 2 x 10$^{8}$ m/s, find the speed of light in water. A) 3 x 10$^{8}$ m/s. B) 2 x 10$^{8}$ m/s. C) 0.5 x 10$^{8}$ m/s. D) 2.25 x 10$^{8}$ m/s. Show Answer Correct Answer: D) 2.25 x 10$^{8}$ m/s. 57. Which term means to bounce off the surface of something? A) Prism. B) Reflect. C) Refract. D) Absorb. Show Answer Correct Answer: B) Reflect. 58. The dark area behind an object that has blocked light. A) Reflect. B) Shadow. C) Refract. D) Energy. Show Answer Correct Answer: B) Shadow. 59. Assertion:Keeping a point object fixed, if a plane mirror is moved, the position of its image does not move. Reason:In a plane mirror, distance between the object and mirror is always equal to the distance between the image and the mirror. A) Both (A) and (R) are true and (R) is the correct explanationofthe(A). B) Both(A)and(R)aretrue, but(R)isnotthecorrect explanationofthe(A). C) (A)istrue, but(R)isfalse. D) (A)isfalse, but(R)istrue. Show Answer Correct Answer: D) (A)isfalse, but(R)istrue. 60. Light bounces when it strikes a smooth and/or lustrous surface A) Reflected. B) Absorbed. C) Refracted. D) None of the above. Show Answer Correct Answer: A) Reflected. ← PreviousNext →Related 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books