Solar Energy: An Alternative EnergyImagine a perfect source of energy.
One with which no pollution what-so-ever isassociated with.No poisonous gasses or destruction of rain forests.Thisabundant source of energy comes from the sun. Solar energy is the visible energyproduced in the sun as a result of a constantnuclear fusion reaction that istaking place. The amount of energy at the solar constant, which is at outer edgeof the earth’s atmosphere, is two calories per minute per cm squared. A calorieis the amount of energy needed to raise one gram of water one degree Celsius. If we could efficiently harness the energy bombarding the earth for twenty-fourhours we could power New York for a year.
Unfortunately the photovoltaic cellsthat change the energy into electricity are so inefficient that it would taketwenty-five years to pay for it’s self in output.There many uses of solar energy. Some homes rely fully on the power of the sunto heat their water.Other houses have flat plate collectors which aid in theheating of the house and water.Solar Energy plays a vital role in theabsorption cooling cycle in a process called solar cooling.Since wind is caused by the up and down movement of hot and cold air, windenergy can be a branch of solar energy. The same thing with tidal energy. Andsince the sun plays a vital role in the water cycle hydroelectric energy can beattributed to solar energy.
Solar Energy has great potential in becoming amain source of energy in thefuture.Bibliography”Alternative Resources”Internet. Large URLSchneider, Herman and Nina.Science for Today and Tomorrow.
Boston: D.C.Health and Company.”Solar Energy.
“Microsoft Encarta.1995 ed.