diff --git a/doc/docs/Python_Tutorials/Near_to_Far_Field_Spectra.md b/doc/docs/Python_Tutorials/Near_to_Far_Field_Spectra.md
index c7df6668c..b17dec665 100644
--- a/doc/docs/Python_Tutorials/Near_to_Far_Field_Spectra.md
+++ b/doc/docs/Python_Tutorials/Near_to_Far_Field_Spectra.md
@@ -374,7 +374,7 @@ $$P_{total} = \int_0^{2\pi} \int_0^{\frac{\pi}{2}} P(\theta) r^2 \sin(\theta) d\
 
 An angular grid of $N$ equally spaced points in $[0, \pi/2]$ has $\Delta \theta = \frac{\pi}{2(N - 1)}$. Note that the same $r^2 \sin(\theta)$ weighting is necessary for the power in any cone, not just over all angles.
 
-A plot of the radiation pattern in polar coordinates and 3D is shown below. Note regarding the coordinate axes in the polar plot: 0° is in the $+z$ direction which is normal to the ground plane and 90° is in the $+r$ direction which is parallel to the ground plane. This is consistent with the convention for the polar angle $\theta$ used in spherical coordinates.
+A plot of the radiation pattern in polar coordinates and 3D is shown below. Note regarding the coordinate axes in the polar plot: 0° is in the $+z$ direction which is normal to the ground plane and 90° is in the $+r$ direction which is parallel to the ground plane. This is consistent with the convention for the polar angle $\theta$ used in spherical coordinates. Also note that the radial flux is a dimensionful quantity but because Meep uses $c = 1$ and $\varepsilon_0$, its units are arbitrary.
 
 ![](../images/disc_radiation_pattern_polar_vs_3d.png#center)