Ncert – class 8- science – Chapter 13: Light 1 Welcome to your Ncert - class 8- science - Chapter 13: Light 1 1. 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 2. Diffused reflection None of these must produce image never produce image may produce image None 3. 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 60º 30º 65º None 4. 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 5. Retina of eye acts like ______ of camera. Shutter Lens Film None of these None 6. 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 7. Image formation takes place by: None of these Regular reflection Diffused reflection Both A and B None 8. In cataract, the lens of the eye becomes small opaque Large Clear None 9. Band of colours seen emerging from a prism is called: wavelength Beam, Spectrum bandwidth None 10. 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 a real image The middle image is the same as the object The middle image will exhibit left-right reversal relative to the object 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 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 cannot see any objects while inside the room you can see the objects inside the room and objects outside the room None 12. Two plane mirrors are at 45º to each other. If an object is placed between them then the number of images will be: 7 6 8 5 None 13. Which of the following is not true about sunlight? Sunlight cannot be split with a prism made of water Sunlight has seven constituent colors All of the above Sunlight is white light None 14. Which of the following letter shaped pipe is most effective to build a Periscope ? A C N Z None 15. Two mirrors are kept at 60 to each other and a body is placed at middle. Total number of images formed is Five Three Four six None 16. 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 Colors appearing on the surface of a soap bubble Rainbow None 17. The instrument that can be used to see things from a concealed position Telescope Microscope Kaleidoscope Periscope None 18. 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 19. Mark correct option. The size of virtual image can be measured by receiving it on screen The laws of reflection of light hold only for plane surfaces Plane mirror alongs form an erect image Plane mirror may form inverted image None 20. The image of an object is formed due to the _________ of light rays by the eye lens on the retina. refraction scattering dispersion reflection 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 comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
