Practicing Success
If A is the amplitude of the wave coming from a point source at distance r then |
$A\, μ\, r^{-2}$ $A\, μ\, r^{-1}$ $A\, μ\, r^{2}$ $A\, μ\, r^{1}$ |
$A\, μ\, r^{-1}$ |
For a point source, $I\, μ\,\frac{1}{r^2}$ and $A\, μ\,\sqrt{I}$ $A\, μ\,\sqrt{\frac{1}{r^2}}$ or $A\, μ\,\frac{1}{r}$ |