All the Wrong Fuses and Splices

March 7, 2012

There are a few different conventions for electromagnetism, and keeping them straight can be a headache.

Here I collect the differences between the particle physics convention

and the… other convention

The particle physics convention is the same as SI if you replace , , and , so you can use any result in e.g. Griffiths easily.

 
Units   “Particle Physics” “Gaussian”
    “Rationalized”  
Lagrangian Density
Hamiltonian Density
Maxwell’s Equations
Fine Structure Constant
Flux quantum
Coulomb’s Law
Biot-Savart Law

You can see it’s just a matter of keeping track of where the goes, which is what makes it so tough to remember.

March 7, 2012

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