Online Encyclopedia

APERTURE (from Lat. aperire, to open)

Online Encyclopedia
Originally appearing in Volume V02, Page 163 of the 1911 Encyclopedia Britannica.
Spread the word: it!
APERTURE (from Lat. aperire, to open), an opening, In optics, it is that portion of the diameter of an object-glass or mirror through which light can pass free from obstruction. It is equal to the actual diameter of the cylinder of rays admitted by a telescope.
End of Article: APERTURE (from Lat. aperire, to open)

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.