⦿ Chapter : Lens ⦿ Topic : State Lens Maker's Formula ....
Basically, this formula relates to the focal length (f) of a lens to the refractive index of the lens and the radii of the curvature of its two surfaces. The focal length of the lens depends upon the refractive index of the material used for making the lens and the radius of curvature. This formula is used by the manufacturers for making the desired lens; that’s it is called the lens maker’s formula.
The lens maker formula is used to design lenses with the required power. The lens maker’s formula which is used to calculate the power of a lens is mentioned as follows below:

1/f=(μ−1)(1/ R1−1/R2)
Where f is the focal length of the lens.
μ is the refractive index.
R1 and R2 are the radius of curvature of both surfaces.