Class 10 Chapter no. 10 Light Reflection and Refraction

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Across
  1. 1. total internal reflection is observed in
  2. 4. the phenomenon of spreading of light into its constituents is called as
  3. 7. an image formed in a spherical mirror has magnification -2.Is image real or virtual?
  4. 8. the bouncing back of the ray in the same medium is called as
  5. 11. the order of colors arranged in spectrum of white light is expressed as
  6. 12. if optical density of a medium is high then the speed of light in that medium is
Down
  1. 2. focal length of plane mirror is
  2. 3. the unit power of lens is
  3. 5. when we insert a coin to a glass half filled slightly which is due
  4. 6. the power of a lens is -4.0D. what is the nature of the lens?
  5. 8. out of seven colors of white light, which color has maximum wavelength?
  6. 9. which one of the following materials cannot be used to make a lens?
  7. 10. light travel fastest