I'm reading about the propagation of EM waves in vacuum.
We define the wave equation using two constants: $\epsilon_0$ and $\mu_0$. Of course they are absolute permittivity and absolute permeability of free space. I've read they have capacitive and inductive properties, I want to know how do we describe it physically?
Or, if I could put it this way: I want to understand the purpose of the inductive and capacitive properties of these constants in the propagation of the waves.