Ncert – class 8- science – Chapter 13: Light 1 Welcome to your Ncert - class 8- science - Chapter 13: Light 1 1. Two plane mirrors are at 45º to each other. If an object is placed between them then the number of images will be: 6 8 7 5 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 9 11 12 None 3. Which of the following is not true about sunlight? Sunlight cannot be split with a prism made of water Sunlight is white light Sunlight has seven constituent colors All of the above None 4. Diffused reflection must produce image None of these may produce image never produce image None 5. Image formation takes place by: Regular reflection Diffused reflection Both A and B None of these None 6. 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 7. In which of the following conditions diffuse reflection takes place? All of these 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. When a parallel beam of light is reflected by a paper sheet. None 8. 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 is the same as the object The middle image will exhibit left-right reversal relative to the object The middle image is a real image None 9. The instrument that can be used to see things from a concealed position Microscope Periscope Kaleidoscope Telescope None 10. 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: 60º 65º 30º 45º None 11. 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 12. Retina of eye acts like ______ of camera. Film Shutter None of these Lens None 13. In cataract, the lens of the eye becomes Clear small Large opaque None 14. Which of the following is not an example of dispersion of light? Colors appearing on the surface of CDs Rainbow Colors appearing on the surface of a soap bubble Colorful display of LED television screen None 15. Which of the following letter shaped pipe is most effective to build a Periscope ? N A C Z None 16. 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 17. Mark correct option. Plane mirror may form inverted image 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 None 18. Band of colours seen emerging from a prism is called: Spectrum wavelength Beam, bandwidth None 19. 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 20. If you read the words of your book, the reflection is diffused reflection None of these specular reflection may be specular may be diffused 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.
