放大摄影下,使用0.05mm的超微焦点X线管,半影阈值为0.2mm,那么最大放大率是A.3倍B.4倍C.5倍D.6倍E.8倍

作者: rantiku 人气: - 评论: 0
问题 放大摄影下,使用0.05mm的超微焦点X线管,半影阈值为0.2mm,那么最大放大率是
选项 A.3倍 B.4倍 C.5倍 D.6倍 E.8倍
答案 C
解析 :M=l+0.2lF,其中F为焦点尺寸,M为该焦点所允许的最大放大率。

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