actinometry - Hutchinson encyclopedia article about actinometry Printer Friendly
The Free Dictionary
1,082,340,669 visitors served.
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

actinometer
(redirected from actinometry)

    Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.04 sec.

actinometer

Instrument devised by English astronomer John Herschel in 1825 to measure the amount of heat received from the Sun by a given surface in a given time.

The term is now sometimes used to describe any instrument having this purpose, for example a pyrometer.

‘Actinic’ is sometimes used to describe the chemical action of radiant energy, the most common being that on a photographic plate. Thus actinometer is an alternative name for what is now usually described as a photographic exposure meter.



How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
 Email
Feedback
?Sign in SSL protected
Email:
Password:
Register

? Mentioned in
No references found
 
Hutchinson browser? ? Full browser
 
 
Hutchinson Encyclopedia
?

Disclaimer | Privacy policy | Feedback | Copyright © 2008 Farlex, Inc.
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.. Terms of Use.