Question

what is lens maker formula

Answer 1

Lens maker formula is 1/f = (n-1) (1/R₁-1/R₂)
Where,f is focal length , n is index of refraction and R₁ and R₂ are the radii of curvature of the two sides of the lens.

Answer 2

Using the positive optical sign convention, the lens maker's formulastates. where f is the focal length, n is the index of refraction, and and are the radii of curvature of the two sides of the lens.