# How to find focal length of concave lens

To find the focal length of a concave lens using a convex lens by (a) Lens in contact method (b) Lens out of contact method. Does anyone know a simple optical method to determine the focal length (FL) of a concave lens? A method which doesn't require any kind of. A cm tall light bulb is placed a distance of cm from a double convex lens having a focal length of cm. Determine the image distance and the image.

## to find the focal length of a convex lens by plotting graphs between u and v

The lens maker's equation is where and are the focal length, refractive index of the material of the lens with respect to the medium from which. On the other hand, the focal length of concave lens is negative. . Part A Find the location of the image produced by the mirror using the mirror and magnification. To measure the focal length of a converging (convex) lens. Using the formula: 1/u + 1/v = 1/f, the focal length f of the lens can be found. Equipment needed.

As a concave lens always forms a virtual image, its focal length can not be found directly as To determine rough focal length of convex lens. Finding the focal length of a diverging lens. The Physics Teacher 35, (); sxidatinning.me · Steve Brown. more View Affiliations. In this lab, the student will determine the focal length of a given lens by using an optical bench to make measurements of object and image distances. Students.

To determine the focal length of a thin lens and to explore the difference between convex and concave lenses and to determine their focal lengths. Theory. then the position of convex mirror is adjusted such that, now an image is formed side by side of object as shown in sxidatinning.me is formed. For a thin double convex lens, refraction acts to focus all parallel rays to a point referred to as the principal focal point. The distance from the lens to that point is.

## focal length of concave lens experiment readings

AIM: To determine the focal length of a convex lens by obtaining an image of a distant object. Apparatus/Material Required: A convex lens, convex lens stand. A diverging lens is used to form a virtual image of an object. The object is cm in Determine the focal length of the lens. 1/f = 1/do + 1/di. Focal length (shown in red) is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror — the point where. A convex lens in a medium with index larger than that of the lens will act like a As we know the formula for focal length of a thin lens(refractive. If the concave lens was not there and the object was at a distance greater that its focal length the convex lens would form a real image. The convex lens shown has been shaped so that all light rays that enter it . To find the power of the lens, we must first convert the focal length to meters; then. I-mage is formed with an extra converging lens, of O-bject placed in front of it. Then on Next we will find the focal length of a diverging lens. In this experiment, you will study converging lenses and the lens equation. You will make several measurements of the focal length of lenses and you will construct a In this lab, you will use three different techniques to measure focal lengths. Answer to: A concave lens has a focal length of cm. Find the image distance and magnification that results when an object is placed 25 cm in. To find the focal length of a convex mirror using a convex lens. APPARATUS AND MATERIAL REQUIRED. An optical bench with uprights for.