The visible light spectrum

The visible spectrum is the portion of the electromagnetic spectrum that is visible to and can be detected by, the animal eye. A typical, healthy human eye will respond to wavelengths from about 400nm to 750nm. Different wavelengths indicate colors in the visible spectrum ranging from violet 400nm to 750nm deep red color with a significant sensitivity peak at 555nm green. As bizarre as it may sound, there is no white or natural light “wavelength”. Natural white light is a combination of different color wavelengths. Think of how light traveling through a glass prism turns into visible monochromatic colors of light called the color spectrum. Now mentally reverse the process where the same colors combine and turn into visible light where we don’t discern the individual colors – even though they exist and play a role in how we feel, act, and what happens within our bodies.