| slovo | definícia |
Focal distance or length of a lens or mirror
(gcide) | Focal \Fo"cal\, a. [Cf. F. focal. See Focus.]
Belonging to,or concerning, a focus; as, a focal point.
[1913 Webster]
Focal distance, or length, of a lens or mirror (Opt.), the
distance of the focus from the surface of the lens or
mirror, or more exactly, in the case of a lens, from its
optical center.
Focal distance of a telescope, the distance of the image of
an object from the object glass.
[1913 Webster] |
| | podobné slovo | definícia |
Focal distance or length of a lens or mirror
(gcide) | Focal \Fo"cal\, a. [Cf. F. focal. See Focus.]
Belonging to,or concerning, a focus; as, a focal point.
[1913 Webster]
Focal distance, or length, of a lens or mirror (Opt.), the
distance of the focus from the surface of the lens or
mirror, or more exactly, in the case of a lens, from its
optical center.
Focal distance of a telescope, the distance of the image of
an object from the object glass.
[1913 Webster] |
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