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lighting
Light is electromagnetic radiation, particularly radiation of a wavelength that is visible to the human eye (about 400700 nm), or perhaps 380750 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 the waveparticle duality. The study of light, known as optics, is an important research area in modern physics.
