Mon June 13, 2011 By: Shreyansh Tyagi

in lens maker formula does an extra term of (n-1)d/n*r1*r2 appear?If yes, why?

Expert Reply
Mon June 13, 2011
Plz clarify what quantity does the symbol d represent in your question. 
But otherwise lens maker's formula is given by.
where f = focal length
         mu = refractive index of lens with respect to outer medium.
R1 and R2 are the radius of curvature of two curved sides of the lens.
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