Jisho

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くう 空気
Noun
1. air showerPhysics
Wikipedia definition
2. Air shower (physics)An air shower is an extensive (many kilometres wide) cascade of ionized particles and electromagnetic radiation produced in the atmosphere when a primary cosmic ray (i.e. one of extraterrestrial origin) enters the atmosphere. The term cascade means that the incident particle, which could be a proton, a nucleus, an electron, a photon, or (rarely) a positron, strikes a molecule in the air so as to produce many energetic hadrons.
Read “Air shower (physics)” on English Wikipedia
Read “空気シャワー” on Japanese Wikipedia
Read “Air shower (physics)” on DBpedia

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