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Old 12-07-2009, 01:50 PM
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Exclamation find the distance between the spots
The widest aperture on my camera lens has a diameter of 7 cm. With it, I can just resolve the separation between two yellow spots on the leaves on a tree if the tree is 600 m away. What is the distance between the spots?

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Old 12-07-2009, 07:25 PM
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distance between spots
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