Vaccum physics JJ Thomson's experiment

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SUMMARY

JJ Thomson's experiment with cathode ray tubes required an improved vacuum to minimize collisions between electrons and air molecules. The discussion highlights the necessity of achieving a high vacuum to ensure accurate results in electric field deflection experiments. Participants emphasized that insufficient vacuum levels would lead to interference, compromising the integrity of the experiment.

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  • Understanding of cathode ray tube functionality
  • Knowledge of vacuum technology and pressure measurement
  • Familiarity with electric field concepts
  • Basic principles of particle physics
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Students of physics, researchers in particle physics, and educators looking to understand the foundational experiments in electron behavior and vacuum technology.

einstein1921
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Why did JJ Thomson need to inprove the vacuum in his cathode ray tube?
how to approximately calculate the pressure if one want to do thomson's electric field deflection experiment?
thank you all!
 
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I'd guess that the vacuum wasn't good enough and the electrons kept colliding with air molecules.
 

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