Date: Dec 22, 2011 3:00 AM Author: mailcwc@gmail.com Subject: Question about solve >> clear all

>> syms f n R1 R1 t

>> solve('1/f = (n-1)(1/R1-1/R2-n/(n-1)*t/R1/R2)','t')

Warning: Explicit solution could not be found.

> In solve at 81

ans =

[ empty sym ]

I tried to solve the LensMaker's equation for t as above,

but it didn't find the answer.

Do I use solve in the wrong way?

This equation should have explicit solution as in the following link.

http://is.gd/3E62xg