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  2. Chapter 10 Class 10 - Light - Reflection and Refraction
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Question 3 Page 184 - Chapter 10 Class 10 - Light - Reflection and Refraction

Last updated at Dec. 16, 2024 by Teachoo

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

    3. Questions from Inside the chapter

    Examples from NCERT Book →
Examples from NCERT Book →
Class 10
Chapter 10 Class 10 - Light - Reflection and Refraction

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo