Wavelengths of colours
- Vacuum UV: <200nm
- Far UV: 200-300nm
- Near UV: 300-400nm
- Violet:
400 - 420 nm
- Indigo:
420 - 440 nm
- Blue:
440 - 490 nm
- Green: 490
- 570 nm
- Yellow:
570 - 585 nm
- Orange:
585 - 620 nm
- Red: 620 -
780 nm
