When rays parellel tp principal axis incident on spherical mirror, the reflected rays converge to a point or diverge from a point on principal axis. What is the point above mentioned called? In which mirror rays diverge from a point and converge to a point? Show in figure. Why is focal length is taken negative for diverge mirror?
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The rays coming parallel to the principal axis of concave mirror converge to a point. This point is called focus or focal point of concave mirror.A plane mirror is the only mirror which always has a virtual, erect, and same size image of the real object. While virtual objects produce real images. The real object presents in front of the mirror and its image appears to be behind the plane mirror. For a plane mirror angle of reflection equals the angle of incidence.