Question

What is the power of lens? Write SI Unit of power of lens and Write the Equation Showing relation between power of lens and focal length.​

Answer 1

Answer:

The power of a lens is defined as the reciprocal of its focal length in meters, or D = 1/f, where D is the power in diopters and f is the focal length in meters. S.I unit of power = Dioptre (D) Power of lense = 1/ focal length in meter.

Answer 2

• Power of a lens is the ability to converge or diverge the light rays.

• The SI unit of power is dioptre.

• Relation between power of lens and focal length.

                     Power = 1/f