本题目来源于试卷: Physics Unit25: Optical Instruments，类别为 国际高中通用物理
[单选题]
In a single-lens reflex camera the lens-film distansc: -3zqcw 2zbce may be varied by slidiiy5bplm(qzo: -o9qx :d z:l1yng the lens forward or backw-:z: ixqqyzdm9o:1pll (5byoard with respect to the camera housing. If, with such a camera, a fuzzy picture is obtained, this means that
A. the lens was too far from the film.
B. the lens was too close to the film.
C. too much light was incident on the film.
D. too little light was incident on the film.
E. none of the given answers
参考答案: E
本题详细解析:
暂无
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