Question

1. Define I dioptre of power. Find the focal length of a lens of power -2.0D.
my goes a lemon kept in a glass tumbler appear to be bigger than its actual size
Study the table given below and state the medium in which light ray will travel
Medium
Refractive Index
1.33, 1.5, 2.4
IV. What do you mean by die namion of list​

Answer 1

Answer:

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.)