本题目来源于试卷: Physics Unit25: Optical Instrument，类别为 Generic Physics
[单选题]
In a single-lens reflex camera the lens-fio 9vmf a-.9mbrlm distance may be v/9lkaq d. 9 v /znxds )gja+c(o.2twvl y*mo4paried by sliding the lens forward or backward with respect to the camera housing. If, with such a camera,o*2d+ n p(s qlya4xjc9om.a/zl)vvg9 tk d/w. 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
| 
Post time 2024-1-26 22:03:25