The radius of curvature of a spherical mirror is 20 cm. What is its focal length? 

 

Answer

Radius of curvature = 20 cm

 

We know that

Focal length is equal to half of Radius of curvature

 

Therefore,

Focal length = Radius of curvature / 2

                   = 20/2

                   = 10 cm

 

The focal length is 10 cm

Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class

Ask a doubt
Maninder Singh's photo - Co-founder, Teachoo

Made by

Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo