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Old Feb 5th 2012, 10:19 AM   #1
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Smile Could any smart cookie help me with this optics/focal length question?

Hey my mind is in a complete blank, been working on this for ages!
Can anyone please be a kind soul and help me out? I'll send you 2 million kudos points because I'm on the verge of tears here haha!!

Thank you for all your time!


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Old Feb 6th 2012, 03:13 AM   #2
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Before we help you to start to help you, may I ask u a question. Which formula in optics do you think is relevant in this question? Or what equations related to lens that you have learnt?
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