Sujet
Fleming's First Vacuum Tube
Légende
England: 1904
Early types of John Ambrose Fleming's two electrode valve, which was the first vacuum tube.
Date
01 janv. 1904
Crédit
Photo12/Underwood Archives/UIG
Notre référence
UMG20A21_440
Model release
Non
Property release
NA
Licence
Droits gérés
Format disponible
48,4Mo (6,6Mo) / 40,6cm x 29,9cm / 4800 x 3528 (300dpi)