Online Encyclopedia

ACTINOMETER (Gr. locals, ray, ,arpov,...

Online Encyclopedia
Originally appearing in Volume V01, Page 157 of the 1911 Encyclopedia Britannica.
» Make a correction to this article.
» Add information or comments to this article.
Spread the word: del.icio.us del.icio.us it!

See also:
ACTINOMETER (Gr. locals,
See also:
ray, ,arpov, measure)  , an
See also:
instrument for measuring the
See also:
heating and chemical effects of
See also:
light . The name was first given by
See also:
Sir
See also:
John
See also:
Herschel to an apparatus for measuring the heating effect of
See also:
solar rays (Edin . Journ .
See also:
Science, 1825); Herschel's instrument has since been discarded in favour of the pyrheliometer (Gr. aGp,
See also:
fire, ijXios,
See also:
sun) . (See
See also:
RADIATION.) The word
See also:
actinometer is now usually applied to
See also:
instruments for measuring the actinic or chemical effect of luminous rays; their
See also:
action generally depends upon photo-chemical changes (see PHOTO-
See also:
CHEMISTRY) . Certain
See also:
practical forms are described in the
See also:
article
See also:
PHOTOGRAPHY .

End of Article: ACTINOMETER (Gr. locals, ray, ,arpov, measure)
[back]
ACTHORITIES 		[next]
ACTINOMYCOSIS (STREPTOTRICHOSIS)

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.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.
Links to articles and home page are encouraged.