Light Essay

Light Essay

Length: 894 words (2.6 double-spaced pages)

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LIGHT: A FUNDAMENTAL FORCE IN OUR WORLD







If asked what light is, one could say that it's one of the most basic



elements of our world and our universe as we perceive it. It is through



sight that we receive 90% of our information. It is through the use of



telescopes aiding the naked eye that we are aware of the heavenly bodies



around us. It is through light that the energy from the sun is transferred



to us. The sun's energy supports the food chain; plants use it to turn



water and CO2 into energy usable by other organisms. Solar energy was also



used, indirectly, to produce all of the fossil fuels that we consume daily.



Since light is such a basic part of our existence, we should have a basic



understanding of what it is.







What we call light, the intangible, powerful force that powers our world,



is somewhat hard to define in real terms. It shares properties with both



particles and waves. It follows the same rules as a wave does--it moves in



a regular fashion, in a perfect sine wave at a certain frequency. It



travels in a straight line, and is subject to refraction. All of these



characteristics are found in waves of any type, from radio frequency waves,



up to Gamma and X- rays. Light, however, also exhibits qualities



characteristic of particles such as neutrons and protons. A photon, or



quanta, is the "packet" of energy that is sent in a light wave. Like a



particle, the photon is believed to have a fi...

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