阅读文字材料完成后面的问题透镜的焦距f的长短标志着折光本领的大小焦距越短折光本领越大.通常把透镜焦距的倒数叫做透镜的焦度用Φ表示即 Template




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tomski阅读文字材料完成后面的问题透镜的焦距f的长短标志着折光本领的大小焦距越短折光本领越大.通常把透镜焦距的倒数叫做透镜的焦度用Φ表示即 coloring