Table 2. Wavelength of visible lights spectrum and depth of penetration (human skin).
Color | Wavelength (nm) | Penetration depth (mm) |
---|---|---|
Red | 622–780 | 4–10 |
Orange | 597–622 | 3–4 |
Yellow | 577–597 | 3 |
Green | 492–577 | 2 |
Blue | 455–492 | 1 |
Violet | 390–455 | 1 |