Measured light vs perceived light

VISIBLE SPECTROSCOPY

Visible light consists of wavelengths ranging from 380 nm (blue violet) to 720 nm (red). When all wavelengths of visible light are present, the light appears "white" to our eyes. If any wavelength is removed (absorbed), we perceive the remaining combination of wavelengths of light as the "complimentary" color (Table 1, Figure 1).

  Light