国产一级特黄aa大片在线观看

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X光機的化學效應

點擊次數:   更新時間:17/06/05 16:58:06  
  來源:www.geologyx.com關閉分    享:
  1.感光作用 同可見光一樣,x光機能使膠片感光。當x光機照射到膠片上的溴化銀時,能使銀粒子.沉淀而使膠片產生“感光作用”。膠片感光的強弱與x光機量成正比。當x光機通過人體時,因人體各組織的密度不同,對x光機量的吸收不同,致綻膠片上所獲得的感光度不同,從而獲得x光機的影像。這就是應用x光機作攝片檢查的基礎。

  2.著色作用 某些物質如鉑氰化鋇、鉛玻璃、水晶等,經x光機長期照射后,其結晶體脫水而改變顏色,這就叫做著色作用。

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国产一级特黄aa大片在线观看
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