# Solve for the focal distance

1. Mar 22, 2013

### SFBKR

I cannot figure out focal distance and the like, is there anyway I can get a walkthrough?
the radius of curvature (R) to 0.7 m and the lens’s refractive index (n) to 1.8 . anyone?

Last edited: Mar 22, 2013
2. Mar 22, 2013

### tiny-tim

Welcome to PF!

Hi SFBKR! Welcome to PF!
What equations do you think will help?

Show us how far you get.