Across
- 2. Energy that enables us to see
- 4. At greater angles of incidence than this, light is totally internally reflected
- 7. instrument used to measure temperature
- 9. Heat transferred through a liquid or gas
- 11. A lens that curves inwards
- 12. An object that releases or emits light is
- 14. heat transfer can occur through a vacuum
- 15. What light does when it hits a mirror
Down
- 1. the part of the eye in which an image forms
- 3. Light is a form of energy called ______ radiation
- 5. Bending of light
- 6. A transparent piece of plastic or glass that is shaped to curve outwards or inwards
- 8. A measure of how easily light passes through a material is called_____ index
- 10. A lens that bulges outwards
- 13. Substance that allows heat to flow.