This thread is archived. 10.05 New Cartesian Sign Convention, Mirror formula and Magnification. Ask Question Asked 1 year, 7 months ago. Confusion in sign convention of magnification? Find the size, nature and position of image formed when an object of size 1 cm is placed at a distance of 15 cm from a concave mirror of focal length 10 cm. Video Progress: Quizzes. Object and screen are moved until the image becomes twice the size of object. 03 Metals and Non-Metals. Write the sign convention used for expressing it and find magnification formed by a concave lens of focal length 20 cm and the object - 17088349 share. Sign convention is a set of rules to set signs for image distance, object distance, focal length, etc for mathematical analysis of image formation. Sort by. Posted by 7 months ago. T he linear magnification produced by a mirror is equal to the ratio of the image distance to the object distance, with a minus sign. 1 comment. New comments cannot be posted and votes cannot be cast . If the shift of object is 6 cm. While we define a sign convention for lateral magnification to indicate whether the image is upright or inverted, for angular magnification, it is standard to only take into account the magnitude, so the directions that the angles are swept-out are not important, and we essentially just use absolute values. 1. Archived. 10.05 New Cartesian Sign Convention, Mirror formula & Magnification. The sign conventions for the given quantities in the mirror equation and magnification equations are as follows: f is + if the mirror is a concave mirror; f is - if the mirror is a convex mirror; d i is + if the image is a real image and located on the object's side of the mirror. Magnification is generally denoted by letter â€˜mâ€™. Active 1 year, 7 months ago. The +/- Sign Conventions. I always seem to get them wrong. Practice Questions . Magnification sign convention. 0 out of 116 steps completed 0%. Back to Lesson CBSE 10 Science . Sign Convention for Spherical Mirror: Cartesian Sign Convention: ... Magnification is the relative ratio of size of image formed by a spherical mirror to the size of object. 01 Chemical Reactions and Equations. Magnification sign convention. Close. 05 Periodic Classification of Elements. 67% Upvoted. 04 Carbon and its Compounds. 02 Acids Bases and Salts. Define magnification. How do I know which signs I have to use for magnification of lens and mirrors? According to it: Object is always placed to the left of mirror; All distances are measured from the pole of the mirror. Viewed 331 times 1 $\begingroup$ A concave mirror forms a real image three times larger than the object on a screen. save hide report.