Sunlight And Solar Energy

Sunlight And Solar Energy
  • In the form of heat and light, solar energy can cover all our energy needs in a clean, versatile manner.
  • Photovoltaics, or Solar panels with silicon cells, convert light into electricity as the photon rays of the sun charge up the cells.
  • Solar-thermal power plants use the heat of the sun along with lenses to focus the sunlight in a concentrated place, to heat water or other substances. This can be used for the hot water needs of households, or to drive a turbine for generating electricity.
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Organic Solar Cells

An organic solar cell is a type of photovoltaic that uses organic electronics—a branch that deals with conductive organic polymers or small organic molecules for light absorption and charge transport to produce electricity from sunlight using photovoltaic effect. Organic solar cells are cheap, resulting in low production costs to form large volumes. Due to the high optical absorption coefficient () of organic molecules, large amounts of sunlight can be absorbed easily and efficiently.



The Units of Energy

The SI (Système International) unit of energy is the JOULE (J) or NEWTON-METER (N*m). The joule is also the SI unit of work.

Photosynthesis is the key to life

Photosynthesis is a way to store stable energy.

Ancient bacteria used a thermal-sensing pigment called bacteriochlorophyll to detect the infrared signal generated by heat. These bacteria were the progenitors of descendants that could make chlorophyll. This pigment captures shorter, more energetic light wavelengths from the sun and uses them as a source of power.

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