本题目来源于试卷: Physics Unit25: Optical Instruments，类别为 通用国际物理
[单选题]
In a single-lens reflex camera the lens-film distance /khdumz-yfzb0:) l: rhj7ch1h ) q m+qmay m07)hl4gaw8uva gxt1 be varied by sliding the lens forward or backward with respect to the camera housing. If, withlv7 1g)0u wghatm 4x8a 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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