Question

What is center of curvature in field of lenses? answer fast please it's urgent

Answer 1

Field Curvature. A simple lens focuses image points from an extended flattened object, such as a specimen on a microscope slide, onto a spherical surface resembling a curved bowl. The nominal curvature of this surface is the reciprocal of the lens radius and is referred to as the Petzval Curvature of the lens.
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