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help1please
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Homework Statement
e is charge
epsilon is permittivity
Homework Equations
[tex]e^2 = 4\pi \epsilon GM^2[/tex]
The Attempt at a Solution
This is just a question really because I am a bit confused about something. Was reading up on the fine structure constant and apparently the fine structure constant is
[tex]\alpha = \frac{e^2}{GM^2}[/tex]
I know it is supposed to be dimensionless, but where did epsilon go? Shouldn't it be
[tex]\frac{e^2}{\epsilon GM^2}[/tex]
Or has epsilon been set to 1?