The photon, or light, can have wave and particle forms. And that can explain why a photon cannot cross the speed of light.

  

"Photons are elementary particles that act as the fundamental carriers of light and all other forms of electromagnetic radiation. They are unique because they have no mass and always travel at the speed of light in a vacuum. Photons exhibit both wave-like and particle-like properties, a dual nature that is central to the field of quantum mechanics. They play a crucial role in various physical processes, including the transmission of energy and information. Credit: SciTechDaily.com" (ScitechDaily, Science Made Simple: What Are Photons?)

The photon, or light, can have wave and particle forms. And that can explain why a photon cannot cross the speed of light. 

The photon, or light, can have wave and particle forms. And those forms are always separated. The photon cannot have wave and particle forms at the same time. The speed of light in a vacuum is 299,792,458 m/s. But the speed of light depends on the environment. But the speed of light is impossible to reach in normal situations. 

But what makes a photon change its form? And could that explain why particles cannot cross the speed of light? There is a possibility. That electromagnetic, or quantum vacuum. Or the shadow tail behind the particle pulls that particle into a straight form that we call wave movement. 

A photon has a wave movement form. And it has a particle form. But those forms are always separated. The photon cannot have wave and particle forms at the same time. And maybe, that thing explains. Why can a photon always travel at the top speed of the environment? But the photon cannot travel faster than light. So the photon’s speed is always the top. 

The photon can take a wave movement form. When it forms an electromagnetic vacuum or tail, which pulls it into a tape-shaped form. If the electromagnetic or quantum field is weak, the quantum shadow will not be so deep. 

"Schematic of the MIT experiment: Two single atoms floating in a vacuum chamber are illuminated by a laser beam and act as the two slits. The interference of the scattered light is recorded with a highly sensitive camera depicted as a screen. Incoherent light appears as background and implies that the photon has acted as a particle passing only through one slit. Credit: Courtesy of the researchers." (ScitechDaily, MIT Just Proved Einstein Wrong in the Most Famous Quantum Experiment)

The photon should be like all other particles. And it interacts with the fields around it like all other particles. If the particle travels through the quantum fields, it leaves the tail or vacuum behind it. That tail pulls the particle to the shape. That looks like a tape. If that shadow or vacuum tail does not form, the particle would reach a far higher speed than it reaches without that tail. When that quantum shadow turns too deep. 

That pulls the particle into the shape. That looks like tape. The nose will inject energy into the particle. But at the same time. It creates the quantum version of the sonic pressure cone. That pulls energy out from the sides of the particle. 

That tape-shaped structure could explain why the photon behaves as it behaves. When a photon travels in the electromagnetic or quantum field, it acts like all other particles. Photon makes a similar cone to the electromagnetic field as an aircraft does. There is an electromagnetic vacuum around the photon. The nose of the photon pushes the field away from it. 

And then the tape-shaped thing goes into the quantum vacuum that pulls energy out from that tape-shaped thing. When the area that conducts energy to the particle becomes too small, the particle starts to deliver more energy than it gets. That means the change from particle to wave movement turns the particles to tape; that nose is the only thing that delivers energy to particle. And the rest of the tape-shaped body releases more energy than the particle can get from its nose. 

https://scitechdaily.com/mit-just-proved-einstein-wrong-in-the-most-famous-quantum-experiment/

https://scitechdaily.com/science-made-simple-what-are-photons/

https://en.wikipedia.org/wiki/Photon