If you wish to take a photo of yourself as you stand $3 \mathrm{~m}$ in front of a plane mirror, for what distance should you focus the camera you are holding?
Added by Brianna J.
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So, if you are standing 3m in front of the mirror, your image appears to be 3m behind the mirror. Second, when you take a photo of this image, the camera needs to focus on the image as if it were a real object. This means the camera needs to focus for the total Show more…
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