1. Define the principal focus of a concave mirror.
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The principle focus of concave mirror is a point on its principle axis to which all the light rays which are parallel and close to the axis, converge after reflection from the mirror. Uses of convex mirrors: 1) Convex mirrors are used in rear view mirror in vehicles because the mirror can diverge a beam of light and create a virtual image.
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Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror. This point is known as the principal focus of the concave mirror.
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