Heat and Light

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Across
  1. 2. Instument used to measure temperature.
  2. 4. The part of the eye on which an image forms.
  3. 5. Bending of light.
  4. 7. At greater angles of incidence than this, light is totally internally reflected.
  5. 8. Rays of light do not cross when producing this type of image.
  6. 10. Lens that curves inwards.
  7. 12. Lens that bulges outwards.
  8. 13. Energy that enables us to see.
  9. 14. Substance that allows heat to flow.
Down
  1. 1. Light is a form of energy called ............ radiation.
  2. 3. Heat transfer through a vacuum.
  3. 4. A measure of how easily light passes through a material is called its ....... index.
  4. 6. What light does when it hits a mirror.
  5. 9. An object that releases or emits light is ...
  6. 11. Heat transfer through a liquid or gas.