photographic zenith tube

Also found in: Acronyms

0.01 sec.

photographic zenith tube [¦fōd·ə¦graf·ik ′zēn·əth ‚tüb]

(optics)

A type of zenith telescope in which light is reflected from a pool of mercury, and the photographic plate is held in a carriage just below the objective that is alternately rotated through 180° and moved slowly across the field of view to follow a star image; used for the accurate determination of time.

Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.

?Page tools

Printer friendly
Cite / link

Feedback

Mentioned in	?		Encyclopedia browser	?		Full browser	?
No references found			Photographic Emulsion photographic field photographic film photographic fixing Photographic Fogging photographic interpretation Photographic Laboratory photographic magnitude Photographic Materials photographic meteor photographic objective Photographic Paper Photographic Photometry photographic plane Photographic Plates photographic processing Photographic Recording Photographic Reduction Photographic Sensitivity photographic sound recorder photographic sound reproducer Photographic Structurometry photographic surveying Photographic Tanning Photographic Telegram photographic zenith tube photographing Photography Photography, Accelerated-motion Photography, Art of Photography, Slow-Motion photography, still photogravure photoheliograph photohomolysis photoinhibition photoinitiated polymerization photoinitiator photointerpretation photoionization photoisland grid photoisolator photoisomer Photojournalism photojunction battery Photolithography photology Photoluminescence Photolysis Photomacrography photomagnetic effect			Photographic slide Photographic slide Photographic slide Photographic Society of America Photographic Society of Hong Kong Photographic Society of Japan Photographic Society of New York Photographic Society of New Zealand Photographic Society of Northwest Arkansas Photographic Society of Petaling Jaya Photographic Society of Queensland Photographic Society of Quincy Photographic Society of Rhode Island Photographic Society of Singapore Photographic Society of Southern Africa photographic sound recorder photographic sound reproducer Photographic Squadron Photographic Squadron, Light photographic strip Photographic Structurometry photographic surveying Photographic Tanning Photographic Telegram Photographic telescope Photographic typesetting Photographic typesetting photographic zenith tube photographical photographical Photographical memory photographically photographically photographically photographing photographing photographing Photographist Photographometer Photographone photographs photographs Photographs Do Not Bend Photographs Exhibited in Britain photography photography photography photography Photography as an art form Photography as an art form Photography as an art form Photography business Photography business Photography business Photography for Real Estate Photography in the Park Photography On The Net Photography, Accelerated-motion

Encyclopedia

Free Tools:	For surfers: Free toolbar & extensions \| Word of the Day \| Help For webmasters: Free content \| Linking \| Lookup box \| Double-click lookup

Disclaimer
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.