What does "vergency" mean?
Vergency: (Opt.) The reciprocal of the focal distance of a lens, used as measure of the divergence or convergence of a pencil of rays. [R.] Humphrey Lloyd.
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00