What is meant by Power of a mirror? A spherical mirror of +1.5 D is in use. Find the focal length of the lens. Is the prescribed lens diverging or converging? If power of a mirror comes out to be negative then which mirror is in use?
converging ability, 0.67D, concave mirror
diverging ability, 0.58 D, convex mirror
both converging and diverging ability, 1D, plane mirror
both converging and diverging ability , 0.67, concave mirror
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Focal power is the degree of a spherical mirror or lens to which a lens or spherical mirror converge or diverge. Power of spherical mirror or lens measured in Diopter(D). Power of lens or spherical mirror can be negative or positive depend upon the type of mirror or lens. It depends upon focal length .
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