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So, the final answer is f=u×vu−v. Note: When the subject is in focus, the focal length of the lens is the distance between the lens and the image sensor, normally expressed in millimetres (e.g., 28 mm, 50 mm, or 100 mm).
- What is the formula for convex lens?
- How is focal length calculated?
- What is the formula of focal length of concave lens?
- What is the formula for focal length of concave and convex mirror?
What is the formula for convex lens?
Derivation of lens formula for convex lens-
1v - 1u= 1f , according to the convex lens equation. It is the relationship between a lens' focal length and the distance between an object in front of it and the picture created by that object.
How is focal length calculated?
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.
What is the formula of focal length of concave lens?
Using the values of u and v, the focal length of the concave lens is calculated using the formula, f= uv/u-v.
What is the formula for focal length of concave and convex mirror?
Suppose an object is placed u cm in front of a spherical mirror of focal length f such that the image is formed v cm from the mirror, then u, v and f are related by the equation; 1/f= 1/u + 1/v. This equation is referred to as the mirror formula. The formula holds for both concave and convex mirrors.
