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10A lens has only one center of curvature.
The optical center is the point where the principal axis intersects the lens.
The focal length is measured from the optical center to the principal focus.
Parallel rays passing through the principal axis always deviate.
The radius of curvature is twice the focal length.
Concave lens causes parallel rays to diverge.
Convex lens causes parallel rays to converge.
The principal axis divides the lens into symmetric halves.
Rays near the edges of the lens refract more than those near the center.
Principal focus is different for convex and concave lenses.
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The optical center of a lens is denoted by:
The principal axis of a lens passes through:
Parallel rays passing through a convex lens:
Parallel rays passing through a concave lens:
The focal length f is:
Rays along the principal axis:
A convex lens has:
A concave lens acts like a combination of:
In a convex lens, rays passing through the center:
The radius of curvature R is related to focal length f by:
The ______ of curvature is the center of the sphere that forms the curved surface of a lens.
Most lenses have ______ centers of curvature, labeled
The ______ of curvature is the distance from the center of curvature to the lens surface, denoted by
The ______ center is the geometrical center of the lens, where the principal axis intersects the lens, denoted by
The ______ axis passes through the optical center and the two centers of curvature.
The principal axis divides the lens into two ______ halves.
The ______ focus of a convex lens is the point where parallel rays converge after passing through the lens.
The ______ focus of a concave lens is the point from which diverged rays appear to originate.
The radius of curvature of a lens is ______ its focal length.
The ______ length f is the distance from the optical center O to the principal focus F.