Why Don't Electrons Stick to the Anode in a Cathode Ray Tube?

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SUMMARY

The discussion centers on the operation of a cathode ray tube (CRT), specifically addressing why electrons emitted from the heated cathode do not adhere to the positively charged anode. The key point is that the anode is positioned outside the direct path of the electron beam, allowing electrons to continue traveling towards the screen. This design ensures that while the anode attracts electrons, it does not obstruct their trajectory, enabling the display of images on the screen.

PREREQUISITES
  • Understanding of thermionic emission and its role in electron generation.
  • Familiarity with the structure and components of a cathode ray tube.
  • Knowledge of electric charge interactions, specifically between positive and negative charges.
  • Basic principles of electron beam dynamics and trajectory.
NEXT STEPS
  • Research the design and function of cathode ray tubes in detail.
  • Explore the principles of thermionic emission and its applications in electronics.
  • Learn about the physics of electron beams and their behavior in electric fields.
  • Investigate modern display technologies and how they compare to CRTs.
USEFUL FOR

Students studying physics, electronics enthusiasts, and anyone interested in the historical technology of display devices.

alan4cult
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Homework Statement


I'm have a little problem with understanding the workings of a cathode ray tube. I understand that a filament is heated and that in turn heats the cathode which, due to thermionic emission emits electrons.

OK so here is my problem. A positively charged anode is used to attract the electrons towards the screen but how come the electrons do not stick to this "positively" charged anode but instead continue past it to the screen?

I hope you understand what I mean!

I'm sorry if I posted this in the wrong forum. I'm new here.
 
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