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Thursday, March 15, 2012

short note on solar energy

Solar energy: The energy emitted by the sun in the form of heat and light (i.e. radiation) is known as solar energy. The sun is the ultimate source of all forms of energy available on the earth. This can be illustrated as follows:
Solar energy heats up the surface of the earth and the air around it. The hot air rises up and the cold air from the surrounding rushes to occupy its space. This makes the air to move. Moving air is known as wind and possesses kinetic energy. Green leaves of plants make their food using sunlight (i.e. sun’s energy) by the process of photosynthesis. The energy stored in the food is known as chemical energy. The food eaten by man or animal provides him the muscular energy. This muscular energy is used to do work. In other words, muscular energy is converted into mechanical energy. The solar energy evaporates the water oceans, rivers, lakes and ponds. The evaporated water forms cloud (having both kinetic energy and potential energy). These clouds on cooling give rain. The rain water flows through rivers and has kinetic energy. The kinetic energy of flowing water rotates the turbine of a generator and produces electricity. Thus, hydro electric energy is also derived from the solar energy. Even the energy of fossil fuels like coal, petroleum and natural gas also comes from the solar energy. Due to high temperature and pressure, the bio-mass of dead animals and plant was converted into the fossil fuel like coal, petroleum and natural gas. These fuels store chemical energy which is converted into heat energy when the fuel burns. This heat energy can be converted into mechanical energy with the help of heat engines.
Thus, we conclude that all forms of energy are derived from a single source –the sun.                                   
 The sun contains mainly light elements like hydrogen and helium. When the atoms of these elements fuse together at extremely high temperature in the interior of the sun, a large amount of energy is radiated in the form of heat. All the plants of solar system receive the energy emitted by the sun. The energy is emitted by the sun in the form of radiation. These radiations are visible rays, infra-red rays (i.e. heat radiation), ultraviolet radiation, gamma rays, x-rays, and radio waves. It may be noted that only some fraction of the total energy emitted by the sun reach the surface of the earth.

11 Responses to “short note on solar energy”

sunny agarwal said...
March 21, 2014 at 5:35 AM

Thnx pooja for d short notes.....!! It is helpfull for me for 2marows xam......!! This is sunny.......!!

Suresh SSK said...
June 29, 2015 at 12:24 AM

Thanks fr pooja...2mro intrvw

jahangirhasia said...
October 15, 2015 at 11:59 PM This comment has been removed by the author.

jahangirhasia said...
October 16, 2015 at 12:00 AM This comment has been removed by the author.

Unknown said...
January 7, 2016 at 2:32 AM


Unknown said...
January 7, 2016 at 2:32 AM


the venom said...
January 7, 2016 at 2:33 AM


Anonymous said...
January 21, 2016 at 12:00 AM

fuck yourself first

Anonymous said...
April 3, 2016 at 9:49 AM

Thanks a lot Pooja

Cindy Dy said...
July 7, 2016 at 12:00 AM

I love surfing and blogging. Thanks for your blogs, I have now another idea what to do on my own blogs. Keep it up. I'll come back later to read more post from you. Thank you.

Abhinav Sharma said...
July 23, 2016 at 7:25 AM

Thnx for these short notes.Helful for my projects..

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