I have this in my home work and i am not 100% on if i have it right or not(adsbygoogle = window.adsbygoogle || []).push({});

A converging lens with a focal length of 25 cm is used to make a slide projector. If the image is to be projected onto a screen 10m away, how far should the lens be located from the transparency?

I did it like this:

1/s + 1/1000cm = 1/25cm

solve for s

1/s = 1/25cm - 1/1000cm

∴ s = 25.64cm (2dp)

Is this right or am i way off. If some one could help would be a big help thanks.

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# Homework Help: Converging Lens

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