Determine focal length of this entire system, Physics

Two positive lens L1 and L2 has the same focal length f>0. The distance between them is f/2. L1 is placed to the left of L2.

(a) An object is placed to the left of L1 with a distance of 4f. Please determine the final image position after this lens system.

b) If we treat this lens system as a single lens, what will be the focal length of this entire system?

Hint: The focus of the combined lens system can be determined by sending parallel rays into this system and see where the light focused.

Posted Date: 2/15/2013 2:44:57 AM | Location : United States







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