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Simpler.
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HansOlsson committed Jun 28, 2023
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3 changes: 2 additions & 1 deletion Modelica/Constants.mo
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Expand Up @@ -32,7 +32,8 @@ package Constants
// The value for mu_0 can now be expressed as 2*alpha*h/(q^2*c),
// where alpha is the experimental fine-structure constant,
// and the value is from https://physics.nist.gov/cuu/pdf/wall_2018.pdf
// Note that mu_0 used to be exactly 4*pi*1e-7 H/m but is now 4*pi*1.00000000055(15)*1e-7 H/m
// The current value of mu_0 is experimentally determined.
// Before 2019 mu_0 was defined to be exactly 4*pi*1e-7 H/m.
final constant SI.Velocity c=299792458 "Speed of light in vacuum";
final constant SI.Acceleration g_n=9.80665
"Standard acceleration of gravity on earth";
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