Focal
['fəʊk(ə)l] or ['fokl]
Definition
(adj.) having or localized centrally at a focus; 'focal point'; 'focal infection' .
(adj.) of or relating to a focus; 'focal length' .
Inputed by Ezra--From WordNet
Definition
(a.) Belonging to,or concerning, a focus; as, a focal point.
Typist: Psyche
Examples
- The more curved the lens, the shorter the focal length, and the nearer the focus is to the lens. Bertha M. Clark. General Science.
- He made use of telescopes 20 and 40 feet in focal length, and of 18. Walter Libby. An Introduction to the History of Science.
- The distance of the principal focus from the lens is called the focal length of the lens, and from the diagrams we see that the more convex the lens, the shorter the focal length. Bertha M. Clark. General Science.
Typist: Psyche