Define principal axis of a spherical mirror ??
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a line passing through the center of the surface of a lens or spherical mirror and through the centers of curvature of all segments of the lens or mirror. Physics. one of three mutually perpendicular axes of a body about which the moment of inertia is maximum or minimum.
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1
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a line passing through the center of the surface of a lens or spherical mirror and through the centers of curvature of all segments of the lens or mirror.
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