# Tag Info

$Z_{fs}$ (space) is resonant at all frequencies due to $\varepsilon_0$ (farads/meter) and $\mu_0$ (henries/meter). Thus it will have no reflection. Free space is lossless and the signal only gets weaker because the energy spreads out over a larger and larger sphere. The /meter part causes space to develop a resonant velocity (speed of light). But all ...