Stunning Derivation Of Lens Maker Formula For Concave Lens

The focal length of a lens depends on the refractive index of the lens and the radii of curvature.

Derivation of lens maker formula for concave lens. 1 recommendation Published in Blogs Physical Science. This is so-called as the formula helps lens manufacturers in finding the radii of curvature of the required lens. Let P be the optical centre or pole of the lens.

These lenses have negligible thickness. The formula is as follows. Following assumption are considered while deriving lens makers formula for concave lens a only point object is taken b the aperature of the lens is small.

Lens formula is applicable for convex as well as concave lenses. Consider a convex lens or concave lens of absolute refractive index m 2 to be placed in a rarer medium of absolute refractive index m 1. SF017 SF027 51 15 Thin Lenses Formula and Lens makers Equation Considering the ray diagram of refraction for 2 spherical surfaces as shown in figure below.

Derivation of Lens maker Formula for Concave Lens Let us consider an object OO located in front of the focal length of the concave lens f on the principal axis of the lens. A lens formula may be defined as the formula which gives the relationship between the distance. In this video learn how to derive lens formula for thin lens.

The concave lens creates an erect and virtual image II at a range of q from the optical center of the lens as shown in the below diagram. Lens formula for concave lens forming virtual image. The combination acts as.

Equation v is known as the lens makers formula. If the focal length is negative it implies that the lens is concave diverging while if positive it implies that the lens is convex converging lenses. Assumptions used in the derivation of lens formula.