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KCET2014PhysicsWave Optics

A focal length of a lens is ( 10 ~cm ). What is power of a lens in dioptre ?

Options

  1. A( 0.1 D )
  2. B( 10 D )
  3. C( 15 ) D
  4. DO ( 20 ) D

Correct answer

B. ( 10 D )

Step-by-step solution

Given, focal length ( =10 ~cm =10 10⁻²=0.1 ~m ) Power of lens ( = 1 f = 1 0.1 =1 ) dioptre Thus, power of lens in dioptre is ( 10 D )

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