Ncert – class 8- science – Chapter 13: Light 1 Welcome to your Ncert - class 8- science - Chapter 13: Light 1 1. Two plane mirrors at an angle (x)º produces 5 images of a point. The number of images produced is (x)º decreased to is(x-30)º 10 12 9 11 None 2. The instrument that can be used to see things from a concealed position Periscope Telescope Microscope Kaleidoscope None 3. Two mirrors are kept at 60 to each other and a body is placed at middle. Total number of images formed is Three Five six Four None 4. In which of the following conditions diffuse reflection takes place? When a parallel beam of light is reflected by a plane mirror. When a parallel beam of light is reflected by a paper sheet. All of these When a parallel beam of light is reflected by a highly polished metal surface. None 5. Suppose you are in a dark room with a small window through which a faint light is getting in. Which of the following statements is true? you can see the objects inside the room and objects outside the room you cannot see any objects while inside the room you can only see object outside the room but not the objects inside the room you can only see object inside the room but not the objects outside the room None 6. Which of the following letter shaped pipe is most effective to build a Periscope ? Z C A N None 7. We can see books even though it does not emit light because It is always visible It reflects light Neither absorbs nor reflects light It absorbs light None 8. Two plane mirrors are at 45º to each other. If an object is placed between them then the number of images will be: 6 7 8 5 None 9. The image of an object is formed due to the _________ of light rays by the eye lens on the retina. dispersion refraction scattering reflection None 10. Diffused reflection None of these may produce image must produce image never produce image None 11. In cataract, the lens of the eye becomes Clear Large opaque small None 12. Which of the following is not true about sunlight? All of the above Sunlight has seven constituent colors Sunlight is white light Sunlight cannot be split with a prism made of water None 13. Retina of eye acts like ______ of camera. Film None of these Shutter Lens None 14. If you read the words of your book, the reflection is specular reflection None of these diffused reflection may be specular may be diffused None 15. Right angle mirrors produce three images of objects. Which of the following is statements is/ are true of the middle image? The middle image is a real image The middle image will exhibit left-right reversal relative to the object The middle image is at the same distance from the mirror as the object The middle image is the same as the object None 16. Two plane mirrors are placed at some angle. There are five images formed, when an object is placed symmetrically between them, the angle between the mirrors is: 30º 45º 60º 65º None 17. Which of the following is not an example of dispersion of light? Rainbow Colors appearing on the surface of CDs Colorful display of LED television screen Colors appearing on the surface of a soap bubble None 18. Mark correct option. The laws of reflection of light hold only for plane surfaces Plane mirror alongs form an erect image The size of virtual image can be measured by receiving it on screen Plane mirror may form inverted image None 19. Band of colours seen emerging from a prism is called: Spectrum wavelength Beam, bandwidth None 20. Image formation takes place by: Regular reflection Diffused reflection Both A and B None of these None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
