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focal point
(redirected from Focal points)

    Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia 0.01 sec.
focal point
the point on the axis of a lens or mirror to which parallel rays of light converge or from which they appear to diverge after refraction or reflection
focal point [′fō·kəl ‚pȯint]
(optics)
The point to which rays that are initially parallel to the axis of a lens, mirror, or other optical system are converged or from which they appear to diverge. Also known as principal focus.
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