Jess and Hollie's Heat and Light crossword

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