The Light Spectrum

The decomposition of light can be observed when we look at a rainbow for example or when a light ray goes through a prism. This is called the light spectrum. The generated light is characterized by the spectral distribution of the various colours. All white lights are not identical. White lights called "warm" have more red components whereas the"cool" ones have more blue components.

This is called the light spectrum. The horizontal axis, or X-axis, corresponds to the wavelength of each spectrum ray. The scale is in nanometer (nm) i.e. one thousand millionth of a meter.

A wavelength may be defined as the distance between successive crests of a wave,especially points in a sound wave or electromagnetic (light) wave. We may describe a wavelength has a specific position within the light (electromagnetic)spectrum.

One of the properties of light is that it acts similar to a wave. Light can be defined by its wavelength and frequency. The frequency is how fast the wave vibrates (goes up and down)The frequency range of the visible light spectrum is from 405 Terahertz to 790 Terahertz.

Different wavelength and frequencies of light will penetrate the human skin differently. A good understanding of these principles will support you in understanding the parameter sand settings to use when treating your clients with light based technology. This is imperative for safe, effective treatments.