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

  1. Class 10
  2. Chapter 10 Class 10 - Light - Reflection and Refraction (Term 1)

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo