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:

Dioptre is the SI unit for measuring power of a lens.

Answer 2

Dioptre is the SI unit of power of a lens.

• In the field of optics, the power of the lens is referred to the light ray bending capabilities of the lens.
• The power of the lens is the reciprocal of the focal length of the lens.
• There is a dedicated SI unit for measuring the power of the lens, which is popularly known as the "Dioptre".
• The power of the lens is written like this - 1D, 2D, 4.5D etc. (D refers to the Dioptre)