関連する話題: Let's enjoy English!Ⅱ; Let’s enjoy English! Ⅴ; Let’s enjoy English! 4

Let's enjoy English!

No.330　13/02/15 12:34
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【How much is the radiation in the natural world？】

《Being bombed from the universe》

CFC,its an abbreviation of a chlorofluorocarbon フロン,which are made from artificial molecules such as carbon,hydrogen,and fluorine フッ素,has destroyed the ozone layer.😱

As a result,a place where there is no ozone layer has appeared over the South pole.It's what is called a ozone hole of environmental problem.😨

《Cosmic rays in high altitude》

When being in high altitude,its atmosphere decreases and its shelter vanishes,so the cosmic rays become strong😃

As to its rate,when going up every 1500 meter,the strength of the cosmic rays becomes twice.😃

Therefore a plane which flies at a height of 10.000 meters are exposed to the radiation which is about hundredth times as strong as the ones on the ground.😨

As for a spacecraft which flies in the space,its researchers have to come up with a way which defenses the radiation.🚀