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Changing units in Electrodynamics for instance comes with unexpected factors in formulas though, indeed containing π. (CGS <-> SI)
by blablabla123 2y ago
Changing units in Electrodynamics for instance comes with unexpected factors in formulas though, indeed containing π. (CGS <-> SI)
- HPsquared 2y agoIsn't that just the change between rad/s and Hz?
- elashri 2y agoIt is more involving [1] [1] https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electricity_and_Magnetism_(Tatum)/16%3A_CGS_Electricity_and_Magnetism/16.03%3A_The_CGS_Electromagnetic_System https://phys.libretexts.org/Bookshelves/Electricity_and_Magn...
- setopt 2y agoIt’s more precisely the difference between “rationalized” and “unrationalized” units. You need a factor 4pi in either Gauss’ law or Coulomb’s law (because they are related by the area 4pi*r^2 of a sphere), and different unit systems picked different ones. It’s more akin to how you need a factor 2pi in either the forward or backward Fourier transform and different fields picked different conventions.
- vitus 2y ago> It’s more akin to how you need a factor 2pi in either the forward or backward Fourier transform and different fields picked different conventions. Some fields even use the unitary transform -- they split the difference and just throw in a 1/sqrt(2pi) in both directions. https://en.wikipedia.org/wiki/Fourier_transform#Angular_frequency_(%CF%89) https://en.wikipedia.org/wiki/Fourier_transform#Angular_freq...