Solar Energy

The energy which we get from the Sun is called solar energy.It is useful form of atomic and wind energy .The rising cost of fuels like oil and gas made the scientist to work on solar energy.Solar energy is 50% of light,50% of infrared radiation.

Solar energy has been used in China,Egypt,Italy etc. to get salt by evaporate salt water.It has been used in the preparation of win,for drying crop.It has been used for pumping irrigation water from the Nile to run an engine.

Now thermal energy is produced from solar energy.When solar rays hits a flat plate type material.it absorbs heat.And this flate plate can be used for house heating,water heating,for getting pure water from sea water.America ,Australia and Japan are using solar water heaters.Solar evaporator,evaporate water from salt water  so that we can get salt.

Now scientist are trying to convert solar energy into electrical energy,and this is done by solar cells .Heat engines are used for converting solar energy to mechanical energy.Solar energy can be used in the sea.Most of the solar energy of the World comes from the sea.At the surface of the water is warmer than at the depth. As we know that that heat flows from the area of high temperature to the area of lower temparature.When we pass this heat of warmer area through heat engine, then heat energy is converted into mechanical or electrical energy.