Magnification by Spherical Mirrors. The expression which gives the relation between these three quantities is called the mirror formula which is given as: Mirror formula is applicable for all spherical mirrors for every position of the object. 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. As the object is always above the principal axis, the height of the object is always positive. Magnification is the increase in the image size produced by spherical mirrors with respect to the object size. The linear magnification produced by a spherical mirror is equal to the ratio of the distance of the image from the pole of the mirror (v) to the distance of the object from the pole of the mirror (u) with a minus sign. Convex mirrors give erect, virtual and diminished image. using search above. Object distance is the distance of the object from the pole of the mirror; denoted by the letter u. Mirror formula: The relation between the distance of the object from the pole of the spherical mirror (u), the distance of the image from the pole of the spherical mirror (v) and its focal length (f) is given by the mathematical formula : It must be remembered that focal length (f) of a spherical mirror is half the radius of curvature (R). If the reflecting surface is the outer side of the sphere, the mirror is called a convex mirror.If the inside surface is the reflecting surface, it is called a concave mirror.. Symmetry is one of the major hallmarks of many optical devices, including mirrors and lenses. Mirror formula is applicable for all spherical mirrors for every position of the object. It is equal to the ratio of image distance to that of object distance. EduRev is like a wikipedia The water forms spherical droplets due to the influence of. Mirror Formula and Magnification - Light Reflection and Refraction, Class 10, Science | EduRev Notes notes for Class 10 is made by best teachers who have written some of the best books of It has gotten 31898 views and also has 4.7 rating. (iii) If the calculated sign turns out to be positive, then the variable calculated is behind the mirror. A water droplet acts as a simple magnifier that magnifies the object behind it. ... Power of Lens and Magnification. Tests & Videos, you can search for the same too. Magnification is also equal to the ratio of image distance to the object distance. Linear magnification when the image is real: As we normally take the object above the principal axis, therefore, h0 is always positive. Linear magnification produced by spherical mirrors : The ratio between the height of the image produced by the spherical mirror to the height of the object is called the linear magnification. 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