Question

1 dipotre is the power of focal length__ cm

Answer 1

Answer:

1 dipotre is the power of focal length 100 cm

Power = 1/ Focal length

1 D = 1/1 metre

Also, 1 metre = 100 cms

Answer 2

A dioptre (British spelling) or diopter (American spelling) 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.)