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Crook_Tubes-variants

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ID = 69507
       
 
   
Tube type:  Geissler Crookes Elster-Geitel Hittorf 
Identical to Crook_Tubes-variants

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Description

Wikipedia

"Crookes tubes evolved from the earlier Geissler tubes, experimental tubes which are similar to modern neon tube lights. Geissler tubes had only a low vacuum, around 10−3 atm (100 Pa),[6] and the electrons in them could only travel a short distance before hitting a gas molecule. So the current of electrons moved in a slow diffusion process, constantly colliding with gas molecules, never gaining much energy. These tubes did not create beams of cathode rays, only a colorful glow discharge that filled the tube as the electrons struck the gas molecules and excited them, producing light."

See other pages for 1879: "Crookes put a tiny vaned turbine or paddlewheel in the path of the cathode rays, and found that it rotated when the rays hit it. The paddlewheel turned in a direction away from the cathode side of the tube, suggesting that the rays were coming from the cathode.

 

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crooksche_roehren_sammlung_ee.jpg

Crook_Tubes-variants
 

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  

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