Magnification formula for mirrors. 3) For most users a 3X or a 5X mirror works very well. A mirror formula can be defined as the formula which gives the relationship between the distance of object ‘u’, the distance of image ‘v’, and the focal length of the mirror ‘f’. If you're seeing this message, it means we're having trouble loading external resources on our website. The expression which gives t… Practice: Nature and size of images from magnification. The mirror formula is applicable for both, plane mirrors and spherical mirrors (convex and concave mirrors). This is the currently selected item. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Practice: Using the magnification formula for mirrors, Practice: Nature and size of images from magnification, Using the magnification formula for mirrors. For make‐up and shaving mirrors the most common ratings are 3X, 5X, 7X and 10X. There is a formula for the magnification but, unfortunately, it is not always applied correctly. Solved example: Mirror formula. Donate or volunteer today! Image distance is the distance of the image from the pole of the mirror and it is denoted by the letter v. And focal length is the distance of the principal focus from the pole of the mirror. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. A plain flat mirror would be rated at 1X and one that makes an object 3 times larger would be rated at 3X. Our mission is to provide a free, world-class education to anyone, anywhere. Determine the image distance and the image size. Khan Academy is a 501(c)(3) nonprofit organization. Practice: Using the magnification formula for mirrors, Practice: Nature and size of images from magnification, Nature and size of images from magnification. Khan Academy is a 501(c)(3) nonprofit organization. Determine the image distance and the image size. Magnification is denoted as the letter ‘m’. Our mission is to provide a free, world-class education to anyone, anywhere. Magnification can also be related to the image distance and object distance; therefore it can also be written as: m = -v/u Where v i… Where, Magnification (m) = h/h’ And h’ is the image height and h is the object height. It can be defined as the extent to which the image appears bigger or smaller in comparison to the object size. It will always less than 1. https://www.khanacademy.org/.../v/magnification-formula-for-mirrors To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Example Problem #1 A 4.00-cm tall light bulb is placed a distance of 45.7 cm from a concave mirror having a focal length of 15.2 cm. The Mirror formula explains how object distance (u) and image distance (v) are related to the focal length of a spherical mirror. Practice: Using the magnification formula for mirrors. Physically, we all understand what is magnification. If you're seeing this message, it means we're having trouble loading external resources on our website. Next lesson. Example Problem #1 A 4.0-cm tall light bulb is placed a distance of 35.5 cm from a convex mirror having a focal length of -12.2 cm. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. Practice: Concave and convex mirrors. Object distance is the distance of the object from the pole of the mirror; denoted by the letter u. m = -v/ u m= h'/h It will be always negative because virtual and erect image is formed by the convex mirror. Donate or volunteer today! It is represented as the ratio of the height of the image to the ratio of the height of the object. As a demonstration of the effectiveness of the mirror equation and magnification equation, consider the following example problem and its solution. As a demonstration of the effectiveness of the Mirror equation and Magnification equation, consider the following example problem and its solution. Refraction of light.