In this video I will make you understand the derivation of famous lens Maker's formula which is important for class 12 exams. The lens maker’s equation is a formula used for lenses that give us a relationship between the focal length, refractive index, and radii of curvature of the two spheres used in lenses. Lenses of different focal lengths are used for various optical instruments. The focal length of a lens depends upon the refractive index of the material of the lens and the radii of curvatures of the two surfaces. The derivation of lens maker formula is provided here so that aspirants can understand the concept more effectively. The lens maker formula is commonly used by lens manufacturers for manufacturing lenses of desired focal length. #optics #lensmakerformula #derivationsclass12