This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Light > Class 7 Science Chapter 11 Light – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 10 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 3) A ray of light that strikes a plane mirror PQ at an angle of incidence of 30 degree, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is: A) 180 degree. B) 30 degree. C) 60 degree. D) 90 degree. Show Answer Correct Answer: C) 60 degree. 2. The bouncing of light off an object is ..... A) Absorption. B) A mirror. C) Reflection. D) Refraction. Show Answer Correct Answer: C) Reflection. 3. A convex mirror is used A) By a dentist. B) Light reflector. C) As a rear view mirror. D) For shaving. Show Answer Correct Answer: C) As a rear view mirror. 4. ..... is a copy of the object formed by reflected or refracted rays of light A) Object. B) Reflection. C) Refraction. D) Image. Show Answer Correct Answer: D) Image. 5. If the angle of incidence is 45 degree, what is the angle between the incident ray and reflecting surface A) 45. B) 90. C) 180. D) None of the above. Show Answer Correct Answer: A) 45. 6. When a light ray strikes a smooth, flat surface, what is the relationship between the angle of incidence and the angle of reflection? A) They combine to add up to 180$^{o}$. B) They are equal. C) The angle of incidence is twice that of the angle of reflection. D) The angle of reflection is twice that of the angle of incidence. Show Answer Correct Answer: B) They are equal. 7. Its ability to increase the confluence of the lens A) Often decreases later. B) Will increase. C) Decreases less then then increases. D) Will be reduced. Show Answer Correct Answer: D) Will be reduced. 8. When a pair of mirrors is placed parallel to each other, how many images are formed? A) 0. B) Infinite. C) 5. D) 2. Show Answer Correct Answer: B) Infinite. 9. What type of lens is this if its power is-5.0D?Find f. A) 25cm convex lens. B) 50cm, convex lens. C) 25 cm concave lens. D) 50cm, concave lens. Show Answer Correct Answer: B) 50cm, convex lens. 10. Kaleidoscope consist of three long strips of plane mirror placed at ..... angle forming a hollow prism A) 45 degree. B) 60 degree. C) Any. D) 90 degree. Show Answer Correct Answer: B) 60 degree. 11. Law of reflection state that-The angle of incidence is ..... to the angle of reflection. A) Equal. B) Double. C) Half. D) None of the above. Show Answer Correct Answer: A) Equal. 12. Another name for a material that does not emit light A) Transparent. B) Opaque. C) Light reflector. D) Non-luminous object. Show Answer Correct Answer: C) Light reflector. 13. A dolphin makes a noise underwater that is too high-pitched for humans to hear. What type of wave is this? A) Microwave. B) Water. C) Electromagnetic. D) Mechanical. Show Answer Correct Answer: D) Mechanical. 14. The bending of light is called ..... A) Refraction. B) Spectrum. C) Reflection. D) Opaque. Show Answer Correct Answer: A) Refraction. 15. The ray of light which falls on the mirror's reflecting surface is called the A) Incident ray. B) Reflected ray. C) Normal. D) Falling ray. Show Answer Correct Answer: A) Incident ray. 16. Cataract can be cured by using A) Concave lens. B) Convex lens. C) Both. D) Surgery. Show Answer Correct Answer: D) Surgery. 17. ..... is an artificial light A) Fireflies. B) Volcano. C) Sun. D) Moon. Show Answer Correct Answer: D) Moon. 18. When this occurs, light rays pass from one transparent medium to another transparent medium. A) Refraction. B) Relfection. C) Transmission. D) Absorbtion. Show Answer Correct Answer: A) Refraction. 19. Habib looks around his classroom at different objects. Which object reflects almost all of the light that strikes it? A) Clear window class. B) Black construction paper. C) A white poster board. D) A red book cover. Show Answer Correct Answer: C) A white poster board. 20. Which shows the path light travels to help you see something? A) Lamp to object to eye. B) Object to lamp to eye. C) Object to eye to lamp. D) Eye to lamp to object. Show Answer Correct Answer: A) Lamp to object to eye. 21. A dark area of surface created by an object blocking light. A) Reflect. B) Shadow. C) Opaque. D) Transparent. Show Answer Correct Answer: B) Shadow. 22. These are all colours of spectrum except A) Indigo. B) Purple. C) Blue. D) Green. Show Answer Correct Answer: B) Purple. 23. The size of a reflection A) The greatest truth is upside down. B) The smallest of myth. C) The smallest is the truth is inverted. D) The greatest truth is straightforward. Show Answer Correct Answer: C) The smallest is the truth is inverted. 24. The curved shining surface of a ..... acts as a mirror. The most common example of a curved mirror is a spherical mirror. A) Bowl. B) Cup. C) Plane Mirror. D) Spoon. Show Answer Correct Answer: D) Spoon. 25. The energy of an electromagnetic wave is related to its amplitude. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 26. Convex mirror is used as a rear view mirror because ..... A) If forms an erect image. B) It forms the diminished image. C) It forms the virtual image. D) All the above reasons. Show Answer Correct Answer: D) All the above reasons. 27. If an object allows most all light to pass through it then it is ..... A) Translucent. B) Cold. C) Transparent. D) Opaque. Show Answer Correct Answer: C) Transparent. 28. The height of the sound waves A) Frequency. B) Amplitude. C) Wavelength. D) None of the above. Show Answer Correct Answer: B) Amplitude. 29. 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. 30. We can see things because light interacts with objects and ..... A) Is colourless. B) Enters our eyes. C) Reflects from our eyes. D) Is absorbed by them. Show Answer Correct Answer: B) Enters our eyes. 31. 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. 32. 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. 33. 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. 34. The bouncing off of light rays from the surface of an object such as a mirror or other shiny surface is called: A) Refraction. B) Reflection. C) Mirror. D) Laser. Show Answer Correct Answer: B) Reflection. 35. 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. 36. The bending of light as it travels from one medium to another medium of different densities. A) Refraction. B) Interference. C) Diffraction. D) Reflection. Show Answer Correct Answer: A) Refraction. 37. 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. 38. 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. 39. If you are using a red color filter, blue objects will appear what color? A) Purple. B) Blue. C) Black. D) Red. Show Answer Correct Answer: C) Black. 40. 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. 41. When a ray of light travels from one medium to another, which of the following factor does not changes A) Velocity. B) Momentum. C) Frequency. D) Speed. Show Answer Correct Answer: C) Frequency. 42. A part of the retina that does not have any rods and cones and is insensitive to light is A) Blind spot. B) Iris. C) Lens. D) Cornea. Show Answer Correct Answer: A) Blind spot. 43. 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. 44. 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. 45. 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. 46. 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. 47. 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 passes through white paint. B) More light is absorbed by white paint. C) More light is reflected off white paint. D) More light is refracted by white paint. Show Answer Correct Answer: C) More light is reflected off white paint. 48. When light bends as it travels from one medium to another A) Absorbs. B) Reflects. C) Echos. D) Refracts. Show Answer Correct Answer: D) Refracts. 49. Where does the light independent reaction take place? A) Cytoplasm. B) Thylakoid membrane. C) Matrix. D) Stroma. Show Answer Correct Answer: D) Stroma. 50. What is a stream of light called? A) Ray. B) Twilight. C) Sunlight. D) Beam. Show Answer Correct Answer: A) Ray. 51. An image that forms where light seems to come from a point but light rays don't actually meet is a A) Real image. B) Inverted Image. C) Clear image. D) Virtual image. Show Answer Correct Answer: D) Virtual image. 52. Which object can you see through clearly? A) Opaque. B) Translucent. C) Transparent. D) Reflective. Show Answer Correct Answer: C) Transparent. 53. Light is a form of ..... that our eyes see. A) Force. B) Matter. C) Reflection. D) Energy. Show Answer Correct Answer: D) Energy. 54. LIGHT ALWAYS PROPAGATES ALONG A STRAIGHT PATH.THIS PROPERTY IS CALLED A) ABSORBERS OF LIGHT. B) RECTILINEAR PROPAGATION OF LIGHT. C) REFLECTORS OF LIGHT. D) None of the above. Show Answer Correct Answer: B) RECTILINEAR PROPAGATION OF LIGHT. 55. What is the distance between pole (P) and centre of curvature (C) known as- A) Radius of Sphere. B) Principal Focus. C) Radius of Curvature. D) Focal Length. Show Answer Correct Answer: C) Radius of Curvature. 56. When light enters from low density to high density medium, it bends A) Towards the normal line. B) Away from the normal line. C) Moves straight. D) None of the above. Show Answer Correct Answer: A) Towards the normal line. 57. A ..... can illuminate a dark room. A) Candle. B) Book. C) All the above. D) None of the above. Show Answer Correct Answer: A) Candle. 58. The brightness of a light is determined by ..... A) Wave speed. B) Air temperature. C) Wavelength. D) Intensity of light waves. Show Answer Correct Answer: D) Intensity of light waves. 59. Which of the following is demonstrated when light bounces off mirrors or shiny surfaces? A) Scattering. B) Reflection. C) Absorption. D) Refraction. Show Answer Correct Answer: B) Reflection. 60. What is the study of light is called? A) Optics. B) Zoology. C) Ornithology. D) Science. Show Answer Correct Answer: A) Optics. ← 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 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