Question

Power of a lens is the reciprocal of its focal length. What is the SI unit of power of a lens? ​

Answer 1

Answer:

SI unit of power of a lens is Dioptre.

Answer 2

The SI unit of power of a lens is Dioptre.

• In the field of optics, the power of a lens is the light bending capabilities of a lens.
• The power of a lens is a measurable physical quantity and can be measured as the reciprocal of the focal length of the lens.
• The SI unit which we use to measure the power of the lens is known as the Dioptre.
• We write the power of lens like this - 1D,2.5D,4D etc. (D means Dioptre.)