In article <3d96d83d@news.povray.org>, orp### [at] btinternetcom says...

> Isn't that the same as F = -r^2 / (4 * Pi * Epsilon_0 * q * Q)?

Hu? No (beware: y/x*z = y*z/x and not =y/(x*z)).

> > Epsilon_0 is a physical constant (8.854 * 10^-12 kg*m^3/(s^2*C^2))
> 
> So... 8.854e-12 is the number... kg*m^3 is the unit... what's the s^2 * C^2
> bit about?

s^2 * C^2 also belongs to the unit (s: seconds, C: Coloumb).

Lutz-Peter

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