Physical terms

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Across
  1. 2. These mirrors reflect light inwards.
  2. 4. the image appears when the rays of light diverge
  3. 6. the change in direction of a wave as it passes from one medium to another.
  4. 7. The centre of reflecting surface.
  5. 8. The distance between the convex lens or a concave mirror and the focal point of a lens or mirror
  6. 10. light rays that are parallel to the principal axis of a concave mirror converge at a particular point on its principal axis after reflecting from the mirror.
Down
  1. 1. These mirrors reflect light outwards.
  2. 3. the image appears when the rays of light converge
  3. 5. The change in direction of light from a surface
  4. 9. a piece of transparent material, usually circular in shape which focuses light