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