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If The Focal Length Of The Lens In Your Camera Is 2cm, At What Distance Must Objects Be Placed So That A Focused Image Is Produced On A Piece Of Film Set 3cm From The Lens? - Math Discussion

If the focal length of the lens in your camera is 2cm, at what distance must objects be placed so that a focused image is produced on a piece of film set 3cm from the lens?

2018-03-20 15:28:10
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