The pole (p) of the mirror is taken as the origin. If your answer is greater than 1, that means the image is magnified. The formula for magnification is = height of image / height of object = -1 However, if an image is behind the mirror, the situation is different. Object distance is the distance of the object from the pole of the mirror; denoted by the letter u. Since cameras involve optics, there is some physics and math involved, but we will keep this simple. An expression showing the relation between object distance, image distance and focal length of a mirror is called mirror formula. Determine the image distance and the image size. Second Formula for Magnification There is another formula of magnification Note : - If magnification (m) is positive , It means image formed is virtual and erect If magnification (m) is negative, It means image formed is real and inverted Questions Example 10.1 - A convex mirror used for rear-view on an automobile has a radius of curvature of 3.00 m. In any case, a convex mirror will have a negative focal length. 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. The expression which gives t… Answer: The magnification is 1 Explanation: Magnification is defined as ratio to a image height to object height, which can be mathematically proven to be same as ratio of image distance to object distance.. Magnification of a mirror is used in many cases. Plug your data into the formula and solve. Virtual images will be located behind the mirror surface. Generally the convex mirror has magnification greater than 1 and magnification of concave mirror has less than 1. The sign convention for spherical mirrors follows a set of rules known as the “New Cartesian Sign Convention”, as mentioned below: a. The Mirror formula explains how object distance (u) and image distance (v) are related to the focal length of a spherical mirror. d. All the distances parallel to the principal axis are measured from the pole (p) of the mirror. e. All the distances … The principal axis is taken as the x-axis of our coordinate system. Assumptions and Sign conventions As a demonstration of the effectiveness of the mirror equation and magnification equation, consider the following example problem and its solution. To calculate magnification, use the following formula: magnification = the height of the image ÷ by the height of the object. Nov 23, 2020 - Mirror Formula and Magnification - Light Reflection and Refraction, Class 10, Science | EduRev Notes is made by best teachers of Class 10. Magnification is the ratio of the size of the image to the size of the real object. b. If your answer is between 0 and 1, the image is smaller than the object. When this number is less than one, it refers to a reduction in size, sometimes called minification or de-magnification.. Finally, if your answer is negative, that means the image is upside down. Negative - ProProfs Discuss A concave mirror will have a positive focal length. This document is highly rated by Class 10 students and has been viewed 31884 times. Magnification is the process of enlarging the apparent size, not physical size, of something.This enlargement is quantified by a calculated number also called "magnification". Physics Grade XI Reference Note: Mirror formula for concave mirror when real image is formed and for convex mirror. 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. c. The object is always placed on the left side of the mirror which implies that light falling from the object on the mirror is on the left-hand side.


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