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Image formation by spherical mirror and their conclusion

Answer» Spherical mirrors are of two types:\tConvex mirrors or diverging mirrors in which the reflecting surface is curved outwards.\tConcave mirrors or converging mirrors in which the reflecting surface is curved inwards. Some terms related to spherical mirrors:1. The centre of curvature (C) of a spherical mirror is the centre of the hollow sphere of glass, of which the spherical mirror is a part.\tThe radius of curvature (R) of a spherical mirror is the radius of the hollow sphere of glass, of which the spherical mirror is a part.\tThe pole (P) of a spherical mirror is the centre of the mirror.\tThe principal axis of a spherical mirror is a straight line passing through the centre of curvature C and pole P of the spherical mirror.\tThe principal focus (F) of a concave mirror is a point on the principal axis at which the rays of light incident on the mirror, in a direction parallel to the principal axis, actually meet after reflection from the mirror.\tThe principal focus (F) of a convex mirror is a point on the principal axis from which the rays of light incident on the mirror, in a direction parallel to the principal axis, appear to diverge after reflection from the mirror.\tThe focal length (f) of a mirror is the distance between its pole (P) and principal focus (F).\t\tFor spherical mirrors of small aperture, R = 2f.\tImage formation by Spherical Mirrors:The nature, position and size of the image formed by a concave mirror depends on the position of the object in relation to points P, F and C. The image formed is real for some positions of the object. It is found to be a virtual image for a certain other position. The image is either magnified, reduced or has the same size, depending on the position of the object.\t


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