Power-law spectrum
= Power-law spectrum
{title2=$F_\nu\propto\nu^{-\alpha}$}
A <radiation spectrum> whose <spectral flux density> follows a <power law> over a stated <frequency> range. For $F_\nu\propto\nu^{-\alpha}$, the <spectral energy distribution> satisfies $\nu F_\nu\propto\nu^{1-\alpha}$. Thus $\alpha=1$ gives equal <energy> flux in equal logarithmic <frequency> intervals. A spectral break invalidates extrapolation with a single index.