LIGHT REFLECTION AND REFRACTION

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Across
  1. 5. .
  2. 7. of a lens is the reciprocal of its ..........
  3. 9. power of a convex lens is Positive and that of a concave lens is ..........
  4. 11. passing through the pole and the centre of curvature of a spherical mirror is called the ..........
Down
  1. 1. ray of light passes ......... after refraction through the optical centre of a thin lens.
  2. 2. immiscible transparent liquids A and B have 1.2 and 1.4 as their refractive indices (with respect to air). The refractive index of B with respect to A is..........
  3. 3. centre of the reflecting surface of a spherical mirror is a point called the .........
  4. 4. reflecting surface of a spherical mirror may be curved inward .......... .
  5. 6. surface of the spoon can be approximated to a
  6. 8. rays of light are reflected by a concave mirror to a point called the.....
  7. 10. SI unit of power of a lens is .........