Across
- 2. Lowest frequency on electricmagnectic radiation
- 5. Form of energy from the sun
- 6. Distance from crest to crest or trough to trough
- 10. Colour with shortest wavelength
- 11. Doctors use this
- 12. Highest point in a wave
Down
- 1. Middle point in a wave
- 3. Fire produces this kind of light waves
- 4. Lowest point in a wave
- 7. Distance from crest/trough to centre line
- 8. Highest frequency on electricmagnectic radiation
- 9. Longest colour wavelength