Define 1 dioptre of power of a lens. | Class 10 Science Chapter Light - Reflection and Refraction, Light - Reflection and Refraction NCERT Solutions

Question:

Define 1 dioptre of power of a lens.

Answer:

1 dioptre is defined as the power of a lens of focal length 1 metre.

∴1 D = 1 m-1

Power of lens is defined as the reciprocal of its focal length. Where P is the power of a lens of focal length f  in metres, then

The S.I. unit of power of a lens is Dioptre. It is denoted by D.


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Welcome to the NCERT Solutions for Class 10 Science - Chapter . This page offers a step-by-step solution to the specific question from Excercise 4 , Question 1: Define 1 dioptre of power of a lens.....