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Solar energy is radiant heat and light from the sun harnessed by using a range of continuously evolving technologies such as solar PV, solar thermal energy, solar heating, solar architecture and artificial photosynthesis.
It is a significant source of renewable energy and its technologies are widely characterized as either active solar or passive solar depending on way they capture and distribute the solar energy or transform it into solar power. Active solar techniques contain the use of concentrated solar power, PV systems and solar-water heating to use the energy. Passive solar techniques include orientation of a building towards the Sun, selecting materials with relevant thermal mass or light dispersing properties, and designing spaces that naturally circulate air.
At the upper atmosphere the Earth receives about 174 PW of incoming solar radiation. Approximately 30% is reflected back to the space while the rest is absorbed by land masses, oceans and clouds.
Solar energy is also used by different natural effects and appears in nature in some other forms of energy. They are indirect forms of energy. Solar energy is “mother” of all forms of energy- as Khan describe it in his book, whether they were conventional or non-conventional, renewable or non-renewable. Various sources of energy find their origin in the sun as mentioned below:
1. Wind Energy
2. Biomass Energy
3. Tidal Energy
4. Ocean Wave Energy
5. Ocean Thermal Energy
6. Fossil Fuels and Other Organic Chemicals
7. Hydro Energy...
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