the ground. About a third is reflected directly back into space by the atmosphere. The

time in which solar energy is available, is also the time we least need it least - daytime.

Because the sun's energy cannot be stored for use another time, we need to convert the

suns energy into an energy that can be stored.

One possible method of storing solar energy is by heating water that can be

insulated. The water is heated by passing it through hollow panels. Black-coated steal

plates are used because dark colors absorb heat more efficiently.

However, this method only supplies enough energy for activities such as washing

and bathing. The solar panels generate "low grade" heat, that is, they generate low

temperatures for the amount of heat needed in a day. In order to generate "high grade"

heat, intense enough to convert water into high-pressure steam which can then be used to

turn electric generators there must be another method.

The concentrated beams of sunlight are collected in a device called a solar furnace,

which acts on the same principles as a large magnifying glass. The solar furnace takes the

In the crystalline silicon, electron-hole generation takes place throughout the

heat. Others reach the junction before their lifetime has expired. There they are separated

"depletion area" or "barrier layer"[Book 4].

nuclei, while conduction electrons, being less closely bound to the nuclei, are free to move

Some common words found in the essay are:
Fahrenheit Solar, Solar Energy, solar energy, Energy October, Jersey Prentice-Hall, Academic Press, Norstrand Co, valence electrons, Bibliography Tran, Pergamon Press, solar cell, conduction band, conduction electrons, crystalline silicon, book 2, energy gap, impurity atoms, , solar cells, Solar Cells, silicon solar cell, photovoltaic power plants, holes acceptor atoms, energy form heat,
Approximate Word count = 1450
Approximate Pages = 6 (250 words per page double spaced)