Across
- 2. where the incident ray hits
- 6. a flat imaginary surface
- 9. something that reflects light from the sun
- 11. the presence of something
- 13. allows some light through
- 14. allowing light to pass through
- 16. not allowing light to pass through
- 17. something that reflects light back in the dark
- 18. a source of radiation
Down
- 1. of reflection the new direction is called the
- 3. doesn't need matter to transfer energy
- 4. something that does not give off light
- 5. 100 watts of energy
- 7. something that happens when light hits a surface
- 8. can be artificial or natural
- 10. flat surface
- 11. the emission of visible light
- 12. when light shines on an object this appears behind it
- 15. something gives out light