The point where light rays that are parallel to the principal axis converge (in the case of a convex lens) or appear to diverge from (in the case of a concave lens) after passing through the lens is known as ________________________.

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Focal point

Pole

Focal length

Radius of curvature

answer is A.

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Detailed Solution

The focal point of a lens is the point where light rays that are parallel to the principal axis converge (in the case of a convex lens) or appear to diverge from (in the case of a concave lens) after passing through the lens.
The focal point is located on the principal axis and is a fixed distance from the lens, which depends on the shape of the lens and its refractive properties.