The Art of Math Art
This Artist Rendering of a Red Photon is based on the Cardioid known to many including Electromagnetic Field Physicists.
The Cardioid is a 2D view of a 3D Cardioid. This Cardioid is more truly represents and the first 7 loops of the 3D Riemann Zeta Function with 1/2 of the momentum of the EM Fields Condensed in this Photon biased in the "forward" direction of travel.