照相机的镜头相当于一个凸透镜,胶卷相当于光屏,被摄物体应在哪里?
照相机的镜头相当于一个凸透镜,胶卷相当于光屏,被摄物体应在哪里?
其他人气:560 ℃时间:2020-02-19 03:40:30
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二倍焦距以外
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