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