May 15th, 2016, 07:40 AM  #1 
Member Joined: Mar 2016 From: Sweden Posts: 35 Thanks: 4  Double convex lenses
I would appreciate som help with the following problem "A simple telescope composing of two positive lenses with focal lengts of 90 cm and 1.5 cm. What's the enlargement of the telescope?" I hope it makes sense and that I translated it well enough! 
May 15th, 2016, 04:29 PM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 3,002 Thanks: 1587  

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convex, double, lenses 
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