Everyday Science Mcqs

Q.  Dioptre is a unit of measurement for __________ ?

a. Current
b. Lens
c. Force
d. Focal Length


ANSWER: See Answer
 
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.
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