The right-handed yellow wave helix can both be understood as rigidly rotation about the yellow equilibrium x-axis
or moving rigidly along the axis with velocity omega/k. This wave form is said to have positive helicity. The geometric
algebra expression for it is:
q_omega (x,t) = a_omega exp(i(omega t - kx)),
with a_omega the constant vector amplitude in the i-bivector plane. The set of green vectors shows how a vector at x=0 would rotate with varying t.
Compare the interactive static version.
Soli Deo Gloria. Created with Cinderella by Eckhard Hitzer (Fukui).