This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Light > Class 7 Science Chapter 11 Light – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The glass front of the mirror is an opaque. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 2. ..... and ..... eclipse are formation of shadow in nature A) Solar, lunar. B) Not Sure. C) Shadow. D) Don't know. Show Answer Correct Answer: A) Solar, lunar. 3. If the pupil is enlarged, it means? A) Person is in normal lighting. B) Person is in a dark room. C) Person is blind. D) Person is in open sunlight. Show Answer Correct Answer: B) Person is in a dark room. 4. Which type of waves are used in broadcasting? A) Radio waves. B) Infrared rays. C) X-rays. D) None of the above. Show Answer Correct Answer: A) Radio waves. 5. Which is an example of a lighter than air aircraft? A) Parachute. B) Hindenberg. C) All the above. D) None of the above. Show Answer Correct Answer: B) Hindenberg. 6. Which of these best demonstrates the reflection of light? (5.6C) A) Looking through the glass of a large window. B) Looking at a star on a clear night. C) Looking at an image formed on a silver spoon. D) Looking at a lightbulb that is glowing. Show Answer Correct Answer: C) Looking at an image formed on a silver spoon. 7. A spherical mirror and a thin spherical lens each have a focal length-15 cm. Mirror and lens are likely to be: A) Both concave. B) Both convex. C) Mirror is concave and lens is convex. D) Mirror is convex and lens is concave. Show Answer Correct Answer: A) Both concave. 8. Which one is an example of light being reflected? A) Seeing yourself in a mirror. B) Lighting a candle. C) All the above. D) None of the above. Show Answer Correct Answer: A) Seeing yourself in a mirror. 9. Dentist use to see an enlarged image of the teeth is ..... mirror A) Plane. B) Convex. C) Concave. D) None of these. Show Answer Correct Answer: C) Concave. 10. Light rays from any light source travel outward in all directions along a straight path until they hit something. which of the following best represents what occurs when light rays hit a glass of water? A) The light rays will pass straight through from air to water. B) The water absorbs the light, and it will no longer be seen. C) The light rays will bend at the boundary of air and water. D) The surface of the water will reflect the light off the water. Show Answer Correct Answer: C) The light rays will bend at the boundary of air and water. 11. A material that does not light pass through A) Solid. B) Transparent. C) Translucent. D) Jopalaye. Show Answer Correct Answer: D) Jopalaye. 12. If the focal length of a lens is doubled, the power of lens ..... A) Becomes four times. B) Is doubled. C) Is halved. D) Remains same. Show Answer Correct Answer: C) Is halved. 13. The side view mirrors on your car help shrink the image on both sides of the car, allowing you to see a larger field of view. What type of mirror is this? A) A concave mirror. B) A concave lens. C) A convex lens. D) A convex mirror. Show Answer Correct Answer: D) A convex mirror. 14. A traffic light is often used to- A) Control traffic on streets. B) Control air pollution. C) Take rest. D) None of the above. Show Answer Correct Answer: A) Control traffic on streets. 15. ..... [Nicotinamide adenine dinucleotide phosphate] accepts and holds two high-energy electrons, along with a hydrogen ion. A) ATP. B) NADPH. C) NADP+. D) ADP. Show Answer Correct Answer: C) NADP+. 16. When light strikes a transparent material, most of the light is reflected. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 17. The ability of an eye to continue to see an image for a very short period of time even after the object is removed is called A) Persistence of light. B) Dispersion of light. C) Accommodation. D) Reflection of light. Show Answer Correct Answer: A) Persistence of light. 18. Your clothing is transparent and allows all light to pass through A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 19. What type of wave is Light A) Transverse wave. B) Longitudinal wave. C) Photon wave. D) Electromagnetic wave. Show Answer Correct Answer: D) Electromagnetic wave. 20. Lens are widely used in A) Microscope. B) Telescope. C) Spectacles. D) All of these. Show Answer Correct Answer: D) All of these. 21. What is phenomenon of bending of light when it goes from one medium to another A) Refraction. B) Reflection. C) Rectillinear Propagation of light. D) Transfraction. Show Answer Correct Answer: A) Refraction. 22. A ..... is an object that contains a lens. A) Clock. B) Ballpoint pen. C) Microwave. D) Microscope. Show Answer Correct Answer: D) Microscope. 23. Which form of energy travels faster than anything in the universe? A) Sound energy. B) Heat energy. C) Light energy. D) Electrical energy. Show Answer Correct Answer: C) Light energy. 24. A concave lens has focal length of 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens? Also, find the magnification. A) U = + 20 cmm =-1.33. B) U =-30 cmm = + 0.33. C) U = + 30 cmm =-0.33. D) U =-20 cmm = + 1.33. Show Answer Correct Answer: B) U =-30 cmm = + 0.33. 25. What can be made when light shines on an opaque object? A) Illuminate. B) A hole. C) A shadow. D) None of the above. Show Answer Correct Answer: C) A shadow. 26. Incandescent lamps last longer than fluorescent lamps. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 27. The bending of light A) Absorption. B) Transparent. C) Reflection. D) Refraction. Show Answer Correct Answer: D) Refraction. 28. A material through which light does not pass A) Transparent. B) Translucent. C) Opaque. D) None of the above. Show Answer Correct Answer: C) Opaque. 29. How many colours can be seen in a visible spectrum? A) 6. B) 1. C) 3. D) 7. Show Answer Correct Answer: D) 7. 30. Front balged part of the eyeball is called A) RETINA. B) PUPIL. C) IRIS. D) CORNEA. Show Answer Correct Answer: D) CORNEA. 31. How is refraction different from reflection. A) Reflection is the bouncing of light off an object and refraction is the bending of light when it moves through one kind of matter to another. B) Reflections is the bending of light when it moves through one kind of matter to another and refraction is the bouncing of light off an object. C) All the above. D) None of the above. Show Answer Correct Answer: A) Reflection is the bouncing of light off an object and refraction is the bending of light when it moves through one kind of matter to another. 32. To bend light waves. A) Prism. B) Refract. C) Opaque. D) Reflect. Show Answer Correct Answer: B) Refract. 33. Which of the following statement(s) is(are) not true?i The speed of light in vacuum is 3 x 105 km/s. ii.The real image is always inverted. iii.Magnification of plane mirror is +1 or-1iv. Image formed by a concave lens is always diminished and real. A) (ii). B) (iii) and (iv). C) (ii) and (iv). D) (i), (iii) and (iv). Show Answer Correct Answer: B) (iii) and (iv). 34. THE SHADOW OF AN OPAQUE OBJECT IS ALWAYS ..... IRRESPECTIVE OF ITS COLOURS A) RED. B) GREEN. C) BLACK. D) WHITE. Show Answer Correct Answer: C) BLACK. 35. What is the correct order of the visible light spectrum? A) Red, yellow, green, orange, blue, violet and indigo. B) Indigo, blue, violet, orange, yellow, green and red. C) Violet, blue, indigo, green, yellow, orange and red. D) Red, orange, yellow, green, blue, indigo and violet. Show Answer Correct Answer: D) Red, orange, yellow, green, blue, indigo and violet. 36. What is occupies two-thirds of the volume of eye? A) Aqueous humour. B) Ciliary muscles. C) Suspensory ligaments. D) Vitreous fluid. Show Answer Correct Answer: D) Vitreous fluid. 37. 2 ) An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the original and final images seen in the mirror is: A) 02 cm. B) 18 cm. C) 04 cm. D) 22 cm. Show Answer Correct Answer: C) 04 cm. 38. What happens to light after it hits a mirror? A) It goes through the mirror and bend. B) It goes straight through the mirror. C) It goes around the mirror. D) It bounces off the mirror. Show Answer Correct Answer: D) It bounces off the mirror. 39. Nishant obtained an inverted and diminished image on looking at A) Inner side of spoon. B) Outer side of spoon. C) Flat surface of plate. D) None of the above. Show Answer Correct Answer: A) Inner side of spoon. 40. When an object 40cm high is placed in front of a plane mirror at a distance of 100cm then the size of the image will be: A) 100cm. B) 20cm. C) 40cm. D) 10cm. Show Answer Correct Answer: C) 40cm. 41. The number of constituent colours of white light A) 5. B) 7. C) 8. D) 6. Show Answer Correct Answer: B) 7. 42. When a ray goes from an optically rarer medium to a denser medium, it ..... A) Bends away from the normal. B) Reflects to the initial medium. C) Continues to travel in a straight line. D) Bends towards the normal. Show Answer Correct Answer: D) Bends towards the normal. 43. What are the primary colors of the pigment? A) Cyan, yellow and magenta. B) Red, green and blue. C) Black and white. D) None of the above. Show Answer Correct Answer: A) Cyan, yellow and magenta. 44. What is the use of light house? A) It guides the sailors. B) It guides the scientist. C) It gives the light. D) None of the above. Show Answer Correct Answer: A) It guides the sailors. 45. Which color has the longest wavelength? A) Red. B) Blue. C) Green. D) Violet. Show Answer Correct Answer: A) Red. 46. A medium that allows ALL light to pass through A) Translucent. B) Opaque. C) Liquid. D) Transparent. Show Answer Correct Answer: D) Transparent. 47. An opaque object stops the light completely, therefore, it casts a dark shadow. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 48. (A) Warnings are often found in car mirrors.(B) Convex mirrors show objects closer than they appear. A) Both (A) and (B) are true and (B) is a correct explanation for (A). B) Both (A) and (B) are true but (B) is not a correct explanation for (A). C) (A) is true but (B) is false. D) (B) is true but (A) is false. Show Answer Correct Answer: C) (A) is true but (B) is false. 49. Which of the following is a reflector of light? A) C) The star. B) D ) Fire. C) A) The sun. D) B) The moon. Show Answer Correct Answer: D) B) The moon. 50. A lamp with a Color Rendering Index of ..... would be appropriate for displaying products at a retail store. A) 30. B) 50. C) 1. D) 90. Show Answer Correct Answer: D) 90. 51. A rainbow is formed through refraction. (They both start with R!) What happen to the white light when it travels through the medium-the rain drop? A) ROYGBIV gets mixed up. B) The light is absorbed. C) The light scatters. D) The different colors of light are bent at different angles due to their speeds. Show Answer Correct Answer: D) The different colors of light are bent at different angles due to their speeds. 52. The object and image distance of a lens are-40 cm and-20 cm respectively then the magnification of lens is A) + 0.25. B) -0.5. C) -0.25. D) + 0.5. Show Answer Correct Answer: D) + 0.5. 53. Which of these things can NOT create light? A) Light bulb. B) Fireflies. C) Plastic. D) None of the above. Show Answer Correct Answer: C) Plastic. 54. An object that separates white light into all the colors. A) Microscope. B) Prism. C) Shadow. D) Telescope. Show Answer Correct Answer: B) Prism. 55. If the angle of incidence of light falling on a plane mirror is 30$^\circ$, what will be the angle of reflection? A) 40$^\circ$. B) 60$^\circ$. C) 55$^\circ$. D) 30$^\circ$. Show Answer Correct Answer: D) 30$^\circ$. 56. The following is required for a shadow to form A) Source of light. B) Screen. C) An opaque object. D) All of these. Show Answer Correct Answer: D) All of these. 57. Is Moon is a luminous object(which emit their own light)? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 58. Moon is a not a light source because it borrows light from the sun. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 59. When Earth comes between Sun and Moon it causes A) Solar Eclipse. B) Lunar Eclipse. C) All the above. D) None of the above. Show Answer Correct Answer: B) Lunar Eclipse. 60. When light hits an opaque object it changes directionand bounces off. This is called ..... A) Refraction. B) Reflection. C) All the above. D) None of the above. Show Answer Correct Answer: B) Reflection. ← 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 8Class 7 Science Chapter 11 Light Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books