Question
Thu May 05, 2011 By: Akankshya Sahu
 

Two identical thin planoconvex lenses of refractive index n are silvered, one on the plane side and other on the convex side. What is the ratio of their focal lenghts?

Expert Reply
Sat May 07, 2011

 

 

When the planoconvex lense is painted on the convex side, then their focal length will be


When the planoconvex lense is painted on the plane side, then their focal length will be


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