Test Your Understanding and Answer These Questions: Rules for Obtaining Images by Spherical Mirrors. what is mirror formula? (ii) For virtual and erect image : According to the New Cartesian Sign Convention, for the virtual and erect images formed by a convex lens. Angular magnification is the ratio of the angle subtended by object and image. The magnification of a mirror is represented by the letter m. where,   h2 = size of image h1 = size of object. The linear magnification (m) of mirror can also be calculated in terms of image distance (v) and object distance (u), if we do not know the size (height) of object and image. image formed is virtual and erect) and m will be negative when h2 is negative (i.e. The linear magnification produced by a spherical lens (convex or concave) is defined as the ratio of the height of the image (h′) to the height of the object (h). What is its S.I. Answer: Q1. what is linear magnification? If the value of magnification is more than 1, then the image formed is enlarged, and if the value of magnification is less than 1, then the image formed is diminished. The linear magnification or magnification of a spherical mirror may be defined as the ratio of the size (height) of the image to the size (height) of the object. The linear magnification or magnification of a spherical mirror may be defined as the ratio of the size (height) of the image to the size (height) of the object. But h2 can be positive or negative depending on whether the image formed is virtual or real. all rights reserved. On the other hand, the real image is always inverted and formed below the principal axis so h2 will be negative. (i) For real and inverted image: According to the New Cartesian Sign Convention, for real and inverted images formed by a convex lens. In case of a convex lens, for real and inverted images, the magnification is always –ve and for the virtual and erect image, the magnification is always +ve. How is linear magnification applicable in plane mirrors. The ratio of the image size to the object size is the same as the ratio of the image distance to the object distance. Linear magnification is the ratio of the size of object and image. Because the jeweler holds the magnifying lens close to his eye and the image forms at his near point, the linear magnification is the same as the angular magnification, so It is denoted by the letter ‘m’ and is given by, The required linear magnification is the ratio of the desired image diameter to the diamond’s actual diameter (Equation \ref{eq15}). It is a pure ratio and has no units. April 28, 2019 by Veerendra. Linear magnification, also called lateral magnification or transverse magnification, is just the ratio of size of the image of an object created by a lens to the object's true size. In symbols, (C) Power Of Lens. It is a pure ratio and has no units. Thus magnification m will be positive when h2 is positive (i.e. As the object is always placed above the principal axis so the magnitude of h1 is always positive. This equation is used to find image distance for either real or virtual images. But how can I prove the equation mathematically? The linear magnification produced by a spherical lens (convex or concave) is defined as the ratio of the height of the image (h′) to the height of the object (h). If this equation shows a negative focal length, then the lens is a diverging lens rather than the converging lens. What is the formula for calculating linear magnification of a specimen when using a hand lens . This shows that linear magnification produced by a lens is also equal to the ratio of the image distance (v) to the object distance (u).

linear magnification formula

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linear magnification formula 2020