Solar Cells

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Title: Solar Cells

Essay Details:

Subject: Science

Author: Thomas B

Date: April 7, 2014

Level: University

Grade: A

Length: 4 / 1124

Essay text:

They do their job silently and there are no moving parts to wear out. It is no wonder that one marvels on how such a device would function. To understand how a solar cell works, it is necessary to go back to some basic atomic concepts. In the simplest model of the atom, electrons orbit a central nucleus, composed of protons and neutrons. each electron carries one negative charge and each proton one positive charge. Neutrons carry no charge. Every atom has the same number of electrons as there are protons, so, on the whole, it is electrically neutral. The electrons have discrete kinetic energy levels, which increase with the orbital radius...

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