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if the first surface is silvered of the lens then what will be the equivalent focal length.

if the first surface is silvered of the lens then what will be the equivalent focal length.

Grade:12th pass

1 Answers

Arun
25763 Points
2 years ago
For Plano convex lens with one side silvered
 
Basically the real net equation for the final focal length of mirror is based on net power:
 
Pnet( equivalent mirror) = 2 P (lens) + P (mirror)
 
-1 /f (equivalent mirror) = 2 /f (lens) - 1/mirror

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