In a 1930 portrait, GE chemist Dr. Irving Langmuir holds a pliotron, a type of vacuum tube he helped to invent in 1912-1913. The tube was used in...
Thomas Edison and Dr. Irving Langmuir are shown here discussing the vacuum tube at the General Electric Research Laboratory. Undated photograph.湯瑪斯·愛迪生
Close-up of the "Fliver" radio set. The Fliver consists of a vernier rheostat, one 50-turn honeycomb coil, a grid condenser, and a 23 plate variable...復古風格, 歸檔
American inventor Lee De Forest is shown with his Audion vacuum tube which enabled live radio broadcasts
An employee assembles a photomultiplier tube at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov....
An employee assembles a photomultiplier tube at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov....
An employee manufactures photomultiplier tubes at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov....
An employee manufactures photomultiplier tubes at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov....
Photomultiplier tubes are manufactured at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov. 4,...
An employee manufactures photomultiplier tubes at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov....
Photomultiplier tubes are manufactured at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov. 4,...
An employee manufactures photomultiplier tubes at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov....
An employee manufactures a photomultiplier tube at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday,...
An employee manufactures a photomultiplier tube at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday,...
Photomultiplier tubes sit in a box at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov. 4, 2015....
An employee inspects photomultiplier tubes at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov. 4,...
An employee manufactures photomultiplier tubes at Hamamatsu Photonics K.K.'s Toyooka factory in Iwata, Shizuoka Prefecture, Japan, on Wednesday, Nov....
Solar Thermal Collectors, here Vacuum Tube Collectors, on the roof of the Federal Environmental Agency on August 14 in Dessau, Germany.
Solar Thermal Collectors, here Vacuum Tube Collectors, on the roof of the Federal Environmental Agency on August 14 in Dessau, Germany.太陽能電池板, 太陽能設備
Solar Thermal Collectors, here Vacuum Tube Collectors, on the roof of the Federal Environmental Agency on August 14 in Dessau, Germany.太陽能電池板, 太陽能設備, 德國
Solar Thermal Collectors, here Vacuum Tube Collectors, on the roof of the Federal Environmental Agency on August 14 in Dessau, Germany.太陽能電池板, 太陽能設備
Solar Thermal Collectors, here Vacuum Tube Collectors, on the roof of the Federal Environmental Agency on August 14 in Dessau, Germany.
Solar Thermal Collectors, here Vacuum Tube Collectors, on the roof of the Federal Environmental Agency on August 14 in Dessau, Germany.
Solar Thermal Collectors, here Vacuum Tube Collectors, on the roof of the Federal Environmental Agency on August 14 in Dessau, Germany.
Solar Thermal Collectors, here Vacuum Tube Collectors, on the roof of the Federal Environmental Agency on August 14 in Dessau, Germany.
close-up of a medical specimen cup and test tube on a blue background, symbolizing health and diagnosis - 真空管 個照片及圖片檔
