Human eye can only see electromagnetic radiation of wavelengths form 400 nm to 760 nm. This narrow part of electromagnetic spectrum is called visible radiation. Visible (white) light is a mixture of light of all kind of colours, it can be separated, with the help of a glass prism, into its component colours - visible light spectrum, and each colour corresponds to a certain area of wavelengths:
| Colour | Wavelength / nm |
|---|---|
| purple | 400 - 450 |
| blue | 450 - 500 |
| green | 500 - 570 |
| yellow | 570 - 590 |
| orange | 590 - 620 |
| red | 620 - 760 |
Generalic, Eni. "Visible radiation." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. {Date of access}. <https://glossary.periodni.com>.
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