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Learn how to calculate the image distance, magnification and power of a lens using the lens formula. Find out the difference between concave and convex lenses and their focal lengths.
- 8 min
- Generally, an optical lens has two spherical surfaces. If the surface is bent or bulged outwards, then the lens is known as a convex lens.
- The power of a lens is the measure of the degree of divergence or convergence of the light ray striking it. The degree of divergence or convergence...
- The power of a lens is the reciprocal of the given lens’s focal length.
- Dioptre is the SI unit for calculating the power of a lens.
- The focal length is the distance between a lens and the focal point. This is the length from a mirror or lens at which parallel light rays meet.
- What Is Focal Length
- What Is Lens Formula
- What Is The Magnification Formula?
- Questions
We have already studied that Distance of Principal Focus from the optical centre of the lens is Called Focal Length It is denoted by f
This formula denotes relationship between 1. Object Distance (u) 2. Image Distance (v) 3. Focal length (f)
It is Ratio of Height of Image to the Height of Object Hence it gives extent image is magnified compared to image of object Suppose Height of object is h Height of Image is h' Magnification is m So Magnification = Height of Image/ Height of Object m = h'/h We also have another formula for magnification in lenses Magnification = v/u where v is image...
Example 10.3 - A concave lens has focal length of 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens? Also, find the magnification produced by the lens. View Answer Example 10.4 - A 2.0 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 10 cm....
Learn the lens formula for spherical lenses and its application in finding image distance, object distance and focal length. Physics Wallah provides notes, solutions, videos and online tests for class 10 physics students.
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3 days ago · According to the Convex Lens equation, the Lens formula is 1/f = 1/v + 1/u. It relates the Focal Length of a Lens with the distance of an object which is placed in front of it and the image formed of that object. Lens magnification is defined as the ratio of the image Length and object Length.
- Glass and water are transparent materials. There is a certain amount of plastic that is transparent so that the plastic can be used to make any Len...
- A Lens is a transmissive optical device that disperses or focuses a light beam utilizing refraction. A simple Lens is a Lens that consists of a sin...
- You can completely rely on Vedantu for the Physics Lens Formula as the experts at Vedantu correctly formulate all the study material related to the...
- A Convex Lens is also referred to as a converging Lens because it causes parallel light to pass through the curve and converge into an area beyond...
1/f = 1/u + 1/v. Convex lens - along with sign convention.
Learn how to use the magnification formula (M= v/u) to find the height and nature of the image formed by a lens. See examples, explanations and tips for class 10 physics students.
- 10 min
- Mahesh Shenoy
Learn the lens formula, linear magnification, power of lens and combination of lenses with examples and derivations. Download free notes prepared by Axisa Academy for CBSE Class 10, Physics, Light, Lens Formula.
