Physics Unit25: Optical Instrument (id: e85a870ae)

[单选题]
In a single-lens refy 7jt;nys3-yvx: ,b u8)j9a1j kuniwwlex camera the lens-film distance may be varied by sliding the lensu89jkbx,ja)iw u :nw1 forward or backward 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