# What is the formula of concave and convex lens?

## What is the formula of concave and convex lens?

The focal length, image distance, and object distance are all connected in the lens formula for concave and convex lenses. The formula 1/f = 1/v + 1/u can be used to establish this link. The focal length of the lens is f, and the distance of the generated image from the lens’ optical centre is v in this equation.

## What is the equation for convex lens?

When the object AB is held close to the lens between O and F the image A’B’ formed by convex lens is virtual, erect and magnified. or, 1/f = 1/v + 1/u is the required equation.

What is concave lens equation?

The formula of concave lens is given by, 1f=1v+1u. Convex and Concave Lenses are two types of basic lenses.

Does the lens equation work with concave lens?

Concave lenses always produce upright, virtual images. For a concave lens, the lens equation is the same but the value of f is now negative.

### What is the formula of focal length of convex lens?

The focal length is half the radius of curvature and is as f=R2 f = R 2 , where f is the focal length, and R is the radius of curvature.

### How do you find the focal length of a concave and convex lens?

The distance between the convex lens or a concave mirror and the focal point of a lens or mirror is called the focal length….Theory

1. f is the focal length of the concave lens L1.
2. u is the distance of I from the optical centre of the lens L2.
3. v is the distance of I’ from the optical centre of the lens L2.

What is R1 and R2 in convex lens?

r is negative for concave faces and positive for convex (as seen from the object). r1 is the radius of curvature of the face closest to the object and r2 is the radius of curvature of the other face. f is positive for converging lenses and negative for diverging lenses.

WHAT IS lens formula state it?

Answer: The lens formula is a mathematical relation between the object distance u, image distance v and focal length f of a spherical lens. This formula is applicable to both convex and concave lenses. An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm.

## What is the formula for mirror and lens equation?

Let’s explore the mirror formula (1/f = 1/v+1/u) and see how to locate images without drawing any ray diagrams. Created by Mahesh Shenoy.

## How do you derive the equation of a lens?

A real, inverted magnified image A’B’ is formed, as shown in the diagram. ∴ This is the lens equation formula….Difference between Concave and Convex Lens.

Concave Lens Convex Lens
A concave lens has a negative focal length A convex lens has a positive focal length