Question

___________ is lens marks formula​

Answer 1

Answer:

I think your question is about lens maker formula, Here is what I have learned from my school.

SHORT ANSWER IS 1/f= (μ-1)(1/R1-1/R2)

Explanation:

Limitations of the lens maker’s formula

The lens should not be thick so that the space between the 2 refracting surfaces can be small.

The medium used on both sides of the lens should always be the same.

Answer 2

Answer:

A lens marker formula may be defined as the formula which gives the relationship for calculating focal length in the term of radii of the two curvatures of lens that is R1 and R2 and the refractive index of lens and surrounding.1/f=(n2/n1-1) (1/R1-1/R2).