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  • Define the power of a lens. Write its S.I. unit.    

Define the power of a lens. Write its S.I. unit.

 

 

Answers (1)

Power is defined as the tangent of angle by which a beam of light falling a unit distance from optical centre converges or diverges.

For \delta is small and h=1

Power P=\frac{1}{f(meter)}

Unit m^{-1} or Diopter.

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Safeer PP

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