Unique What Is Lens Maker Formula

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.

What is lens maker formula. Let us consider a ray OP incident on a convex lens parallel to the principal axis at a height h shown in figure. Lets figure out the focal length of the convex lens when its kept in air and oil. The lensmakers equation relates the focal length of a simple lens with the spherical curvature of its two faces where and represent the radii of curvature of the lens surfaces closest to the light source on the left and the object on the right.

Lets do some problem-solving. It may be written as. Join Login 12th Physics Ray Optics and Optical Instruments Image Formation by Lenses Write the Lens makers form.

It is used by lens manufacturers to make the lenses of particular power from the glass of a given refractive index. Lens manufacturers use the lens makers formula to manufacture lenses of the desired focal length. For a double convex lens the radius R1is positive since it is measured from the front surface and extends right to the center of curvature.

Equation 2432 gives the focal length of a double convex lens ie a lens for which both surfaces are convex in terms of the radii of curvature of the two surfaces. The manufacturers of the lenses use this relation to design the lens of. Lens Makers Formula Watch More Videos at.

Lens-Makers Formula For a thin lens the power is approximately the sum of the surface powers. In this session Tushar sir will be discussing the topic Lens Maker Equations Mirror Formula with practice multiple choice questions from Class 10 Physic. 13 from Schroeder 1987.

For a double concave lens Fig. It gives the relation between focal length radii of curvature of surfaces and refractive index of its material. The focal length of a lens depends on the refractive index of the lens and the radii of curvature.