(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Determine the focal length of a plano-concave lens (n=1.5) which has a radius of curvature of 10 cm. What is its power in diopters?

2. Relevant equations

None given.

3. The attempt at a solution

1/f=(n-1)(1/R_1-1/R_2)=(1/2)(-0.1)=-1/20.

Thus f=5 cm and P=-20 m^(-1).

Is this right?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Plano-concave thin lens, checking my result

**Physics Forums | Science Articles, Homework Help, Discussion**