Why does light only move in the forward direction?

Mainstream physics has no explanation why light only moves forward in Huygens Principle.

The light spheres of Huygens Principle radiate out in all directions, but they only ever move forward in space and time.

Huygens’s Picture of Wave Propagation:                                             

If a point source of light is switched on, the wavefront is an expanding sphere centered at the source.  Huygens suggested that this could be understood if at any instant in time, each point on the wavefront was regarded as a source of secondary wavelets, and the new wavefront a moment later was to be regarded as built up from the sum of these wavelets. For a light shining continuously, this process just keeps repeating. Huygens’ Principle of 1670, says: “Every point on a wave front has the potential for a new spherical wave”

In this theory, light only moves forward in space and time because every point on a wave front has the potential for a photon electron coupling or dipole moment.

When the wavefront (surface of the sphere 4πr²) comes in contact with the electron probability cloud of an atom it forms a photon electron coupling or dipole moment forming new light waves.  

The dynamic geometry of this process forms an uncertain ∆×∆pᵪ≥h/4π future continuously unfolding with the exchange of photon ∆E=hf energy.

Therefore, we see light always moving forward in space and time taking the shortest route and shortest time!

The interior of the sphere 4π is naturally three dimensional giving us our three dimensions of everyday life with the one variable in the form of Time ∆E ∆t ≥ h/2π.

We have spherical light waves with particle characteristics of light coming into existence relative to the surface of the sphere, therefore we square the radius r². Because of this the wave-function ψ² is squared the electron e² is squared and the speed of the process c is squared as in E=MC² representing one geometrical process.

When there is an exchange of energy in the form of a photon ∆E=hf electron coupling the energy levels cannot drop below the centre of the sphere because the process is relative to the radius. This forms a constant of action in space and time that we see mathematically as the Planck constant h/2π. Because the square of probability is relative to the spherical surface (wave-function ψ²) and the centre of the sphere (Planck constant h/2π), it forms another constant when there is an exchange of energy in the form of the Fine Structure Constant 1/137.

This spherical geometry give us a reason why so much is squared in physics, e=mc², t², e², ψ² and velocity v² as in kinetic Eₖ=½mv² energy. In the equation for kinetic energy, we have the constant ½ representing the radius being ½ the diameter of the sphere.

The two-dimensional surface of the spheres forms a manifold for charge with the inner concaved surface forming negative charge and the outer surface forming positive charge. This dynamic geometry forms CPT symmetry with only combination of charge (C), parity (P), and time (T) ever observed to be an exact symmetry of nature at the fundamental level.