Images Formed by Spherical Mirrors - Drawing the ray diagrams is an ideal way to illustrate the formation of images by spherical mirrors. The spherical mirror For a spherical mirror, the curve shown above is part of a circle of radius r. Moreover, C is the center of the circle, since the line segment CP is perpendicular to the tangent line at point P. Hence the length of CP is equal to r. Note that the triangle CFP is isosceles, hence the length of the sides FP and FC are equal. De nition: A real image is in front of a mirror and is upside down. u), image-distance (i.e. Concave mirror formula. Assumptions and Sign conventions Physics Grade XI Reference Note: Mirror formula for concave mirror when real image is formed and for convex mirror. Aperture: The aperture of a spherical mirror is the diameter of the reflecting surface of the mirror. NOTE: The focal length for a concave mirror is positive and the focal length for a convex mirror … The reflecting surface of a spherical mirror is by and large spherical. 2. f) of a spherical mirror. In Fig.10.2, distance MN represents the aperture. Typically such a mirror is not a complete sphere, but a spherical cap — a piece sliced from a larger imaginary sphere with a single cut. Spherical Mirror. The diameter of the reflecting surface of spherical mirror is called its aperture. Although one could argue that this statement is quantifiably false, since ball bearings are complete spheres and they are shiny and plentiful. We shall consider in our discussion only An expression showing the relation between object distance, image distance and focal length of a mirror is called mirror formula. A spherical mirror is a part of a hollow sphere of glass whose one side is reflecting while the other side is opaque. To derive concave mirror formula consider fig. v), and focal length (i.e. One of the easiest shapes to analyze is the spherical mirror. ... Mirror formula expresses the relationships among the object-distance (i.e. A ray of light starting from the end point A of the object and moving parallel to the principal axis strikes the mirror at the point E. it is reflected at E and passes through the principal focus F. Before discussing the reflection of light by spherical mirrors we shall discuss the meaning and types of spherical mirror and some important terms related with spherical mirrors. (14.4) where an object OA, is placed in front of a concave mirror. For a plane mirror M= 1. C. spherical mirrors De nition: A virtual image is an image behind a mirror which usually has the same orientation as the object. The surface, then, has a circular outline.