Unitless ratio

1. Sep 6, 2003

Tton

I was wondering if any of you could help me out a little. I have this unitless ratio:

1/(1.36*10^23) = 7.33*10*(-24) = ((e^2)(k))/((c)(h))
(k=coulomb's constant & h = h-bar)

i need to know what the significance of this number is, and apparently there is a lot.

2. Sep 7, 2003

Staff Emeritus
This is the fine structure constant, denoted &alpha;. It sets the strength of the electromagnetic force.

3. Sep 7, 2003

Best line ever!!!