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Old Nov 5th 2009, 07:00 PM   #1
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Optics - Refraction (Lens')

The focal length of a slide projector's converging lens is 10.0 cm.

If a 35 mm slide is positioned 10.2 cm from the lens, how far away must the screen be placed to create a clear image?
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Old Nov 5th 2009, 07:59 PM   #2
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Please remember to post your attempt or difficulty so that we can guide you to the way to solve the problem. In brief, lens formula should be used.
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Old Nov 5th 2009, 08:13 PM   #3
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nvm i found my mistake. a silly one too.
do i still have to post the solution?
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Old Nov 5th 2009, 10:48 PM   #4
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Please post your attempt and check this thread for previous similar posts.
This is a straightforward application of the lens equation.
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