Standing 2.5 m in front of a plane mirror with your camera, you decide to take a picture of yourself without turning the camera around. To what distance should the camera be focused to get a sharp image?
人气：159 ℃ 时间：2020-04-17 18:55:37
解答
5m,the distance from the image in the plane mirror to the mirror equal the distance from you to the mirror.
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