Question 2 Page 168 - Chapter 10 Class 10 - Light - Reflection and Refraction

Last updated at April 16, 2024 by

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

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