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