Slika:Crookes tube.jpg
Velikost tega predogleda: 800 × 531 točk. Druge ločljivosti: 320 × 212 točk | 640 × 425 točk | 1.050 × 697 točk.
Izvorna datoteka (1.050 × 697 točk, velikost datoteke: 208 KB, MIME-vrsta: image/jpeg)
Spodaj prikazane informacije so s tamkajšnje opisne strani.
Povzetek
| Opis |
English: An early Crookes x-ray tube on display in the lobby of the Science Building at Winthrop University. These first generation 'cold cathode' tubes were used until about 1920. The electrode on the right is the cathode or negative electrode. The slanted electrode in the center of the bulb is the platinum anode or target. The electrode to the left is called the auxiliary anode. A high voltage applied between the cathode and anode ionized the small amount of residual air in the tube, creating cathode rays (electrons) at the cathode, which were accelerated and struck the anode, creating x-rays. The x-rays radiated through the side wall of the tube.
The two projections on the neck of the tube to the right is a 'softening device' to control the pressure in the tube. With time the residual gas in Wikipedia:Crookes tubes was absorbed by the walls, increasing the vacuum. This reduced the amount of x-rays produced and resulted in 'harder' more energetic x-rays, until finally the tube stopped working. The 'softeners' used various techniques to release a small amount of gas into the tube, restoring it's function. |
| Datum | |
| Vir | Photo by Y. Trottier |
| Avtor | Y. Trottier |
Licenca
Jaz, imetnik avtorskih pravic na tem delu, ga s tem objavljam pod naslednjimi licencami:
|
Ta dokument je dovoljeno kopirati, razširjati in/ali spreminjati pod pogoji Licence GNU za prosto dokumentacijo, različica 1.2 ali katera koli poznejša, ki jo je objavila ustanova Free Software Foundation; brez nespremenljivih delov ter brez besedil na sprednji ali zadnji platnici. Kopija licence je vključena v razdelek Licenca GNU za prosto dokumentacijo. |
  
|
Datoteka je objavljena pod licenco Creative Commons Priznanje avtorstva-Deljenje pod enakimi pogoji 3.0 Nedoločena. | |
| ||
| Ta oznaka dovoljenja je bila datoteki dodana kot del posodobitve licence GFDL. |
Datoteka je objavljena pod licenco Creative Commons Priznanje avtorstva 2.5 Generična.
- Dovoljeno vam je:
- deljenje – reproducirati, distribuirati in javno priobčevati delo
- predelava – predelati delo
- Pod naslednjimi pogoji:
- priznanje avtorstva – Navesti morate ustrezno avtorstvo, povezavo do licence in morebitne spremembe. To lahko storite na kakršen koli primeren način, vendar ne na način, ki bi nakazoval, da dajalec licence podpira vas ali vašo uporabo dela.
Izberete lahko licenco po svoji izbiri.
Zgodovina datoteke
Kliknite datum in čas za ogled datoteke, ki je bila takrat naložena.
| Datum in čas | Sličica | Velikost | Uporabnik | Komentar | |
|---|---|---|---|---|---|
| trenutno | 07:23, 26. marec 2011 | | 1.050 × 697 (208 KB) | Dicklyon | try to rescue |
| 05:52, 10. april 2006 |  | 2.288 × 1.712 (494 KB) | Ytrottier | An "electron tube" on display in the lobby of the Science Building at Winthrop University. Photo by Y. Trottier, April 10th, 2006. |
Uporaba datoteke
Datoteka je del naslednjih 2 strani slovenske Wikipedije (strani drugih projektov niso navedene):
Globalna uporaba datoteke
To datoteko uporabljajo tudi naslednji vikiji:
- Uporaba na it.wikipedia.org
- Uporaba na lv.wikipedia.org
- Uporaba na su.wikipedia.org
