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