Question

A person wears spectacles of zero power even when the lens is spherical in nature.how is this possible?what will be the power and the focal length of such lens

Answer 1

The power and the focal length will also be zero.

Answer 2

A lens cannot be of power 0 , because of the following

1 Dioptre = 1/1 m

so if the power of the lens is = 0

0 = 1/0

but 1 divided by zero is = Infinity,

so 0 is not equal to infinity so this is not possible