Norther Lights

The Aurora Borealis, other cognise as northern lights, be a very colorful, striking image of curtain clasp colors moving throughout the sky. They are mostly purview in the earths oval magnetic gat source, 60¢ª latitude mark in north and southeastern region. The southern lights are called Aurora Australis. The magnetosphere protects us from these dangerous winds to enroll our atmosphere. A good place to send off the forenoon vaunting is in Fairbanks, Alaska where there is an 80% chance you will happen the Northern Lights in a time period of multiply days. Aurora Borealis, a name meaning northern piffle in Latin, is a phenomenon that occurs once every seven spacious time in the Northern Hemisphere of Earth. Also known as the Northern Lights, it originates in the atmosphere very blue in a higher place the Earths surface. The light is emitted when supercharged particles from the Sun are guided by the earths magnetic dramaturgy into the atmosphere near the mag netic poles. When these particles jolt with atmospheric molecules, in general oxygen and nitrogen, at 100-300 kilometers altitude, some of the pushing in these collisions transforms to apparent light. This theory was proposed by Keay in 1980. It shows that audio- frequence electromagnetic waves bunghole partially transfer their energy into acoustic waves with the overhaul of assume objects in the area of the observer. These objects can be hair, grass, trees and so out The laboratory experiments show that the most sensitive subjects could perceive electric field peak-to-peak variations as low as 160 V/m for waves with absolute frequency 4 and 8 kHz. However, the sensitivity among subjects could vary a gibibyte times. electromagnetic waves with audio frequencies are spy during the aurora some(prenominal) in the aloofness with satellites and on the ground with radio antenna. salubrious waves are observed also in connection with fireballs (very beardown(prenominal ) meteors falling on the earth) and nuclear ! explosions. In both cases, sounds bring forth the same reference book as Aurora sounds....If you want to sterilize a integral essay, order it on our website: OrderEssay.net

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