Online Encyclopedia

FOCUS (Latin for " hearth " or " fire...

Online Encyclopedia
Originally appearing in Volume V10, Page 587 of the 1911 Encyclopedia Britannica.
Spread the word: del.icio.us del.icio.us it!
FOCUS (Latin for " hearth " or " fireplace "), a point at which converging rays meet, toward which they are directed, or from which diverging rays are directed; in the latter case called the virtual focus (see MICROSCOPE; TELESCOPE; LENS). In geometry the word is used to denote certain points (see GEOMETRY; CONIC SECTION; and PERSPECTIVE).
End of Article: FOCUS (Latin for " hearth " or " fireplace ")
[back]
FOCSHANI (Rumanian Focrani, sometimes incorrectly w...
[next]
FODDER

Additional information and Comments

There are no comments yet for this article.
» Add information or comments to this article.
Please link directly to this article:
Highlight the code below, right click and select "copy." Paste it into a website, email, or other HTML document.