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A garden solar lamp A child in Zambia studying by the light of a lamp charged by solar power during the day. A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter.
Solar energy is the radiant energy from the Sun's light and heat, which can be harnessed using a range of technologies such as solar electricity, solar thermal energy (including solar water heating) and solar architecture.
The solar luminosity (L ☉) is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun. One nominal solar luminosity is defined by the International Astronomical Union to be 3.828 × 10 26 W. [2]
In photometry, luminous energy is the perceived energy of light.This is sometimes called the quantity of light. [1] Luminous energy is not the same as radiant energy, the corresponding objective physical quantity.
The solar constant is a measure of flux density, is the amount of incoming solar electromagnetic radiation per unit area that would be incident on a plane perpendicular to the rays, at a distance of one astronomical unit (AU) (roughly the mean distance from the Sun to Earth).
The heliosphere, the tenuous outermost atmosphere of the Sun, is filled with solar wind plasma and is defined to begin at the distance where the flow of the solar wind becomes superalfvénic—that is, where the flow becomes faster than the speed of Alfvén waves, [87] at approximately 20 solar radii (0.1 AU). Turbulence and dynamic forces in ...
Solar irradiance is the power per unit area (surface power density) received from the Sun in the form of electromagnetic radiation in the wavelength range of the ...
A device that utilizes solar energy (e.g. "solar panels") Solar calendar, a calendar whose dates indicate the position of the Earth on its revolution around the Sun; Solar eclipse, an eclipse of a sun in which it is obstructed by the moon; Solar System, the planetary system made up by the Sun and the objects orbiting it; Solar Maximum Mission ...