(math-standard-units): Add eps0, permittivity of vacuum.

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 949271cfec9c29395a1e5d7ed753f026262e473a..0fd5f4bd667a3049af3e0d92cb91c7ec02d8f919 100644 (file)
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2008-11-19  Ulrich Mueller  <ulm@kph.uni-mainz.de> (tiny change)
+
+       * calc/calc-units.el (math-standard-units): Add eps0,
+       permittivity of vacuum.
+
 2008-11-19  Dan Nicolaescu  <dann@ics.uci.edu>
 
        * files.el (project-settings-file): Remove.

diff --git a/lisp/calc/calc-units.el b/lisp/calc/calc-units.el
index eed99cea3415389250e4a26351f66327d831c0e3..20ccb924166254628e6c3fbdd8934f8afab80251 100644 (file)
--- a/lisp/calc/calc-units.el
+++ b/lisp/calc/calc-units.el
@@ -259,6 +259,7 @@
               "6.62606896 10^-34 J s (*)")
     ( hbar    "h / (2 pi)"                  "Planck's constant" ) ;; Exact
     ( mu0     "4 pi 10^(-7) H/m"            "Permeability of vacuum") ;; Exact
+    ( eps0    "1 / (mu0 c^2)"               "Permittivity of vacuum" )
     ( G       "6.67428*10^(-11) m^3/(kg s^2)"    "Gravitational constant" nil 
               "6.67428 10^-11 m^3/(kg s^2) (*)")
     ( Nav     "6.02214179*10^(23) / mol"    "Avagadro's constant" nil