deduce the relation between focal length and radius 0f curvature for a concave mirror
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Deduce a relation between focal length (f) and radius of curvature (R) for a concave mirror. ... After reflection from the mirror, this ray passes through its focus F as per the laws of reflection. If C is the cente of curvature, then CP = R, is the radius of curvature and CB is normal to the mirror at point B.
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