-- www.eigenmath.org/quantum-electric-field.txt
-- derived units
joule = kilogram * meter^2 * second^(-2)
volt = kilogram * meter^2 * second^(-3) * ampere^(-1)
farad = kilogram^(-1) * meter^(-2) * second^4 * ampere^2
-- physical values
hbar = 1.054572 * 10^(-34) * joule * second
epsilon0 = 8.854188 * 10^(-12) * farad * meter^(-1)
c = 299792458 * meter * second^(-1)
lambda = 600 * 10^(-9) * meter
omega = 2 * float(pi) * c / lambda
-- conversion constant
C = sqrt(0.5 * hbar * omega * epsilon0^(-1) * meter^(-3))
C
volt * meter^(-1)