Light Is Not Photon: UPT Explains Light as a Process of Vacuum Expansion–Contraction

(ChatTRUTH) For more than a century, light has been described by two major models:

• the electromagnetic wave, oscillating within an invisible field;

• and the photon, a “light particle” carrying the energy hν.

Despite their predictive success, neither model answers the fundamental questions:
What exactly is oscillating?
And what is a “photon” if it possesses no intrinsic spatial structure?

The Unified Post-Modern Theory (UPT), developed by Mr. Lê Thanh Hảo, offers a completely new perspective:
light is the propagation of an expansion–contraction configuration of the foundational vacuum belonging to the Foundon,
not an electromagnetic vibration, and not a stream of particles.

1. Space in UPT: not emptiness, but the vacuum of the Foundon

According to TOU 13–36, UPT asserts:

• Every Foundon possesses its own intrinsic vacuum.

• The space we inhabit is in fact the vacuum of Foundons, not an empty medium.

• Each position in the Universe belongs intrinsically to one and only one Foundon.

Thus, a light wave does not “travel through space.”
Space itself is a form of matter — the intrinsic vacuum of Foundons — continuously expanding and contracting to create waves.

2. Light waves in UPT: propagation of vacuum expansion–contraction

UPT characterizes a Foundon by its standard intensity distribution I(r).
When a variation ΔI appears at a location, the vacuum begins to:

• contract,

• then expand,

• and propagate this variation outward according to the standard distribution.

This alternating expansion–contraction is the essence of a wave.

Light is simply a special configuration of propagating ΔI, defined by:

• its frequency ν,

• its amplitude,

• and its cyclical organization of expansion–contraction.

There is no “stream of light particles” traveling across the universe.
There is only the Foundon’s intrinsic vacuum self-adjusting and transmitting that adjustment outward.

3. Photon in UPT: a localized packet of ΔI waves

This is the most important departure from traditional physics.

UPT defines:

A photon is a localized packet of the vacuum expansion–contraction wave (ΔI), formed as a packet when a stable system emits or absorbs energy.

From this definition:

• A photon is not a particle

It does not exist as a discrete object moving independently through space.

• A photon appears only when a stable system changes levels

When an atom or stable system transitions between energy levels, it produces a ΔI packet — a localized wave packet.
Conversely, when absorbing energy, it receives that same ΔI packet.

• A photon is not “a chopped-off piece of a wave”

The light wave propagates continuously.
The photon is simply a localized ΔI packet whose energy equals exactly the amount exchanged by the system.

• A photon is an effective but grounded concept

It does not describe the essence of light; it describes how stable systems exchange energy with ΔI waves.

Through this, UPT explains quantum phenomena without requiring an independent, particle-like photon.

4. Wave–particle duality disappears naturally

20th-century physics claimed light is both a wave and a particle.
UPT shows this is a consequence of misunderstanding the nature of vacuum.

• Wave: the propagation of vacuum expansion–contraction.

• Photon: a localized ΔI packet produced or absorbed by a stable system.

There is no contradiction.
No “duality.”
Only one underlying nature: the expansion–contraction wave of vacuum, with the photon being a localized form of that wave during energy exchange.

5. The speed of light is not constant

According to TOU 43, the propagation speed of ΔI is not an absolute constant. It depends on:

• the intensity differences I across regions,

• the expansion–contraction state of the vacuum,

• and the accumulation structure of the Foundon in the region through which the wave passes.

The value c corresponds only to regions where the vacuum is nearly homogeneous — consistent with all observations, but not a fundamental limit.

6. Light – wave – force: a unified mechanism

UPT shows that three seemingly distinct phenomena are actually one:

• Force = the expansion tendency of vacuum (TOU 44).

• Wave = propagation of vacuum expansion–contraction.

• Light = a special form of ΔI wave.

• Photon = a localized ΔI packet created during energy exchange.

All of these belong to one unified dynamics, the dynamics of I(r).

Conclusion

Within the UPT framework, light is understood from the deepest foundation of reality:

• not an electromagnetic field,

• not a photon particle,

• but a propagating expansion–contraction process of the Foundon’s intrinsic vacuum.

A photon appears only during energy-exchange events, as a localized packet of the ΔI wave.

Thus, UPT not only resolves the wave–particle paradox but also establishes a unified framework for all matter, forces, and space.