Find the power of a concave lens of focal length 2 m.

 

Answer

Since focal length of concave lens is negative

Focal length = 2m



We know that,

Power of a lens = 1/Focal Length

                          = 1/( 2) 

                          = 0.5 D

 

Power of a concave lens is 0.5 D

  1. Class 10
  2. Chapter 10 Class 10 - Light - Reflection and Refraction

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.