Aurora

dawn Borealis Auroras are known as northmostern and due southern glacial lights or (aurorae). They are natural light displayed in the sky, in the polar regions. The Aurora Borealis is usually observed at night and they typically occur in the ionosphere. Auroras are usually evident between 65 to 72 degrees in the north and south latitudes, which places them right next to the Arctic and the Antarctic circle. They occur so deep in the polar regions and so uncommon that it is covert to the naked eye. The Aurora Borealis was named after the Roman Goddess of click Aurora, the Greek name for north wind. Auroras result from emissions of photons from Earths top(prenominal) atmosphere in a higher place 80km from ionized atomic number 7 atoms regaining an electron, and newton and group O atoms returning to from an excited state to impale ground state. They are ionized by the collision of solar wind particles creation accelerated along the earths magnetic knowledge do main lines. The fervour skill is lost by the collision of other atom or molecule. The oxygen emissions are potassium or brownish- rubicund, depending on the criterion of energy absorbed. The nitrogen emissions are drab or red. If its blue the atom regains an electron after it has been ionized.

When it turns red it is turning into ground state from an excited state. Oxygen is eccentric to turn to ground state. It takes three quarters of a insurgent to emit green light for 2 minutes and hence turn to red. The atoms and molecules that bump around will absorb the excitation energy and pr eveningt emission. The real top of the atmosphere has a higher percentage of oxygen, and it is s o thin that collisions are elevated to allo! w quantify for oxygen to emit to red. Collisions are untold more frequent progressing protrude into the atmosphere, so the red emissions jadet have time to happen. Sometimes not even green lights emit for this reason. ? ?If you requirement to get a honorable essay, order it on our website: OrderEssay.net

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