"Virtual Measurement of e/m Lab" Courseware

Download the free physics courseware module using MATLAB.

Course Materials Include:

Virtual Measurement of e/m

This interactive module follows J.J. Thomson’s landmark experiment to measure the charge-to-mass ratio of the electron, e/m. These materials are designed to be flexible and easily modified to accommodate a variety of teaching and learning methods. The MATLAB app is a virtual reproduction of the e/m apparatus and allows students to conduct the experiment virtually.

Learning Goals

  • Explain the forces present in the experimental apparatus
  • Derive the physical relationships required to compute the e/m ratio
  • Estimate the value of e/m
  • Compute the experimental error and discuss its sources
  • Relate the underlying theory to mass spectrometry

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