Light is electromagnetic radiation, particularly radiation of a wavelength that is visible to the human eye (about 400–700 nm), or perhaps 380–750 nm.[1] In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not. Three primary properties of light are: * Intensity * Frequency or wavelength * Polarization Light, which exists in tiny “packets” called photons, exhibits properties of both waves and particles. This property is referred to as...