vergency

English

vergency (plural vergencies)

The act of verging or approaching; tendency.
The reciprocal of the focal distance of a lens, used as a measure of the divergence or convergence of a pencil of rays.
- 1863, The Civil Engineer and Architect's Journal
  When, by the pencil becoming oblique to the surface, the vergency produced on the pencil becomes changed, the primary and secondary focal points, V and H, separate […]

单词	vergency
释义	vergency English Noun vergency (plural vergencies) The act of verging or approaching; tendency. The reciprocal of the focal distance of a lens, used as a measure of the divergence or convergence of a pencil of rays. 1863, The Civil Engineer and Architect's Journal When, by the pencil becoming oblique to the surface, the vergency produced on the pencil becomes changed, the primary and secondary focal points, V and H, separate […]
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