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May 28, 2015

Homework Help: Physics: Lenses

Posted by Anonymous on Monday, March 23, 2009 at 11:39am.

1) A convex lens with a focal lenght of 4.0cm is placed 20.0cm from a concave lens with a focal lenght of 5.0cm. Find the position of the image when the object is placed 12.0c, in front of the convex lens.

2) A double concave lens has a refractive index of 1.5 radii of curvature of 10.0cm and 15cm. Determine its focal length.

Thank you for helping in advance!

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