Exploring Thomson's Charge to Mass Ratio: Implications for Cathode Rays

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SUMMARY

Thomson's experiments demonstrated that the charge to mass ratio of cathode rays remains constant regardless of the cathode material or tube composition. This finding indicates a fundamental property of cathode rays, suggesting that charge and mass, while distinct entities, can yield a consistent ratio. The discussion also touches on the implications of ratios in physics, comparing them to other ratios like speed and density, which involve different physical quantities.

PREREQUISITES
  • Understanding of Thomson's experiments with cathode rays
  • Basic knowledge of electric and magnetic fields
  • Familiarity with the concept of charge to mass ratio
  • Awareness of dimensional analysis in physics
NEXT STEPS
  • Research the historical context and significance of Thomson's experiments on cathode rays
  • Explore the mathematical formulation of charge to mass ratio in particle physics
  • Study the implications of ratios in physics, focusing on speed and density
  • Investigate the use of Natural units, such as Planck units, in scientific measurements
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Physics students, educators, and researchers interested in the foundational principles of particle physics and the historical development of atomic theory.

linux kid
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HowStuffWorks: Atoms said:
By applying an electric field alone, a magnetic field alone, or both in combination, Thomson could measure the ratio of the electric charge to the mass of the cathode rays.
He found the same charge to mass ratio of cathode rays was seen regardless of what material was inside the tube or what the cathode was made of.

Charge and mass are two completely different things, how can you have the same ratio of the two? :rolleyes:
 
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linux kid said:
Charge and mass are two completely different things, how can you have the same ratio of the two? :rolleyes:

the ratio is not a dimensionless number (unless you're using Natural units such as Planck units and then the measure of anything is actually a dimensionless number).

when one considers the concept of speed, it's a ratio of length to time, likewise two completely different things. or density, a ratio of mass to volume, again two completely different kinds of quantity.
 

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