Across
- 2. heat transfer through a vaccuum
- 5. instrument used to measure temperature
- 9. heat transfer through a liquid or a gas
- 12. bending of light
- 14. energy that enables us to see
- 15. rays of light do not cross when producing this type of image
Down
- 1. a measure of how easily light passes through a material is called its _________ index
- 3. an object that releases or emits light is
- 4. A transparent piece of glass or plastic that is shaped to curve inward or outwards
- 6. light is a form of energy called ......... radiation
- 7. a lens the curves inwards
- 8. substance that allows heat to flow
- 10. a lens the bulges outwards
- 11. what light does when it hits a mirror
- 13. the part of the eye on which an image forms