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October 31, 2014

Homework Help: Physics

Posted by Help please on Tuesday, October 23, 2012 at 9:22am.

The following four lenses are placed together in close contact. Find the focal length of the combination.
Lens 1- F'= +200mm
Lens 2- F'= -125mm
Lens 3- F'= -400mm
Lens 4- F'= +142.9mm

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