Sunlight received directly, which has traveled in a straight path from the sun, also referred to as beam radiation. See also: Diffuse radiation, Global radiation
The component of solar radiation that comes directly from the sun without being diffused or reflected.
Light received by direct solar rays, unobstructed by clouds, haze, etc. (See Diffuse Radiation)
Radiation that has traveled a straight path from the sun, as opposed to diffuse radiation.
The energy from the sun that reaches the earth directly.