Ultraviolet light (UV light) is a type of electromagnetic radiation that is located between visible light and X-rays in the electromagnetic spectrum. It is invisible to the human eye, and has a frequency greater than that of visible light but lesser than X-rays. It has a wavelength ranging from about 10 nm to 400 nm (ISO, 2007). UV light is a part of the radiation that comes from the sun. It can also be produced artificially by electric arcs, black lights, tanning lamps and mercury vapor lamps. The name Ultraviolet literally translates to “beyond violet”, as it has a ...
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Modern astronomy
There were four main contributors to modern astronomy: Sir Isaac Newton, Johannes Kepler, Galileo Galilei, and Tycho Brahe. Brahe advocated for the new standards for having a more precise observation even though he did not personally believe in the view of heliocentric. All of his contributions were huge for astronomy because he was able to create new instruments along with being able to calibrate them. He would check the accuracy of his instruments on a regular basis so it helped him to revolutionize instruments for astronomy. Kepler was an assistant for Brahe until he died in 1601. This helped ...
English
Argumentative Essay on Global Warming What is global warming, and how is it affecting the Earth and its populations? Since global warming appeared during the last decade as a serious environmental issue, it has been the subject of a lot of debate. Global warming is defined as the warming of the earth by greenhouse gases emitted into the atmosphere,causing the atmosphere to become warmer. But there are many questions about global warming, from its causes to its effects. During the past 10,000 years, the Earth's climate has been extraordinarily beneficial to humanity. "Humans have prospered tremendously well ...
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ORDER AN ESSAYWhat is Global Warming
What is global warming, and how is it affecting the Earth and its inhabitants? Global warming is sometimes referred to as the greenhouse effect. The greenhouse effect is the absorption of energy radiated from the Earth's surface by carbon dioxide and other gases in the atmosphere, causing the atmosphere to become warmer. The greenhouse effect is what is causing the temperature on the Earth to rise, and creating many problems that will begin to occur in the coming decades.
Effects of Global Warming
For the last 10,000 years, the Earth's climate has been extraordinarily beneficial to mankind. "Humans have prospered tremendously ...
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