Ncert – class 8- science – Chapter 13: Light 2 Welcome to your Ncert - class 8- science - Chapter 13: Light 2 1. Which of the following scientists did the pioneering work to understand the splitting of white light in different components? Issac Newton Archimedes Albert Einstein Thomas Edison None 2. A man stands symmetrically between two large plane mirrors fixed to two adjacent walls of a rectangular room. The number of images formed are 6 3 4 2 None 3. Which of the following is correct regarding reflection. Reflection is a phenomenon by which light incident on a surface is scattered Reflection is a phenomenon by which light incident on a surface passes into another medium Reflection is a phenomenon by which light incident on a surface is sent back into the same medium Reflection is a phenomenon by which light incident on a surface is absorbed by the surface None 4. White light can be separated into its components because Each ray of color is deviated by the prism by the same amount. Few rays of color are deviated by the prism by the same amount and others by a different amount. None of these Each ray of color is deviated by the prism by a different amount. None 5. Which of the following does not lie in the plane of reflection ? Normal at the point of incidence Reflected ray Reflecting surface Incident ray None 6. Periscope is built on the concept of reflection of light refraction of light scattering of light dispersion of light None 7. Choose the correct option regarding luminous objects Objects which glow can be luminous objects All objects which glow are luminous objects Objects which is not source of light is luminous objects None of the above None 8. How are things visible to us? Light from the object gets reflected and makes the object visible. The reason is still not known. Both A and B can occur according to the light condition Light gets reflected from our eyes and makes the object visible. None 9. When a student looks into a plane mirror, she sees a virtual image of herself. However, when she looks into a sheet of paper, no such image forms. Which light phenomenon occurs at the surface of the paper? Polarization Regular reflection Diffuse reflection Resonance None 10. Mark the incorrect statement: Mirror changes the direction of light falling on it All are true. Light travels along a straight line. Things are only visible when light from our eyes reaches the object. None 11. Choose the correct option Moon is a luminous object because it is a source of light Sun is a luminous object because it is a source of light Moon is a luminous object because it glows Sun is not a luminous object None 12. Which surfaces will reflects most of the light falling on them? Rough surface Shiny surface Opaque surface Flat surface None 13. The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to accomodation far-sightedness near-sightedness presbyopia None 14. In a periscope, the reflecting mirrors will be: At an angle of 60o Perpendicular to each other Parallel to each other At an angle of 30 o None 15. When a light ray falls on a perfectly reflective mirror at an angle. Identify which of the following statement is true about the ray? The wavelength of the light ray changes The direction of motion of the light ray changes The velocity of the light ray changes The frequency of the light ray changes 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.
