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1、会计学1极光的英文介绍极光的英文介绍(jisho)演示演示第一页，共13页。The aurora of Earth is The aurora of Earth is produced by excitating(orproduced by excitating(or ionizating)atomic or upper ionizating)atomic or upper atmospheric Molecular atmospheric Molecular that are from the Earths that are from the Earths magnetosphere or
2、flow of magnetosphere or flow of charged particles of solar.charged particles of solar.There are three conditions There are three conditions To generate aurora:To generate aurora:Atmospheric,magnetic and Atmospheric,magnetic and the solar wind.the solar wind.In the solar system,In the solar system,a
3、urora is not just appeared aurora is not just appeared on the Earth.Some on the Earth.Some planets that have magnetic planets that have magnetic field also have aurora.field also have aurora.第1页/共13页第二页，共13页。There are many ancient story about aurora.For example:In a ancient Chinese book named“Shan h
4、ai jing”,aurora has been recorded.It says that an immoral living in the north has a shape that likes a red snake.It can twinkle in sky at night.People call it Chu Long,whith,In fact,is aurora.第2页/共13页第三页，共13页。第3页/共13页第四页，共13页。第4页/共13页第五页，共13页。第5页/共13页第六页，共13页。第6页/共13页第七页，共13页。第7页/共13页第八页，共13页。幻日第8页/
5、共13页第九页，共13页。Sun dogs is an optical phenomenon of the atmos-phere.there are a lot of hexa-gonal columnar crystals of ice floating in translucent thin clouds of sky.The crystals of ice occasionally arranges vertically in the air.When the sun light goes through the hexagonal ice,light will be refract
6、in a order.第9页/共13页第十页，共13页。When the ice crystals appear near the sun rising or sun set,three branches of light from the icicles will inflect into humans eyes.The middle of the light is from the real sun,the others are indexed lights.But in peoples eyes,there are more than a sun in the sky,which are around the biggest real sun.第10页/共13页第十一页，共13页。第11页/共13页第十二页，共13页。第12页/共13页第十三页，共13页。