Question

Express power of a lens in terms of its refractive index and radii of curvature.

class 12 phy
if this is a study app answer this​

Answer 1

Explanation:

According to the lens maker's formula,

1f=(n2n1−1)(1R1−1R2),

Here, n2 is the refractive index of the lens and n1 is the refractive index of the medium from which the light is incident on the lens. The medium surrounding the lens must be the same for this formula to work.

R1 and R2 are the radius of curvature of the curved surfaces of the lens from which the light enter the lens and emerges out of the lens respectively.