This photographer captured stunning video of a plane leaving rainbow contrails. Scientists say this happens when ice crystals — formed when cold, moist air condenses around particles from the plane exhaust — are aligned at the right angle with the sun. https://t.co/PfEEIZLPw3 pic.twitter.com/iE7BgYTgZl
科學家解釋,當飛機在高空飛行時,壓力會降低,空氣溫度也會下降,這時如果空氣中的水分足夠多,飛機後方形成的蒸氣就會結冰,生成冰晶( Ice Crystals )。美國航太總署的專家也表示,當冰晶體與太陽剛好行形成對齊的角度時,就會發生影像中的彩虹效應。
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