Ver"gen*cy (?), n. 1.
The act of verging or approaching; tendency; approach. [R.]
2. (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.
Ver"gen*cy (?), n. 1.
The act of verging or approaching; tendency; approach. [R.]
2. (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.