A. Current
B. Lens
C. Force
D. Focal Length
Submitted by: Rashid Mehmood
A dioptre is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in metres. (1 dioptre = 1 m−1.) It is thus a unit of reciprocal length.
Correct Answer: Lens ✔
Last Updated: December 24, 2019