Double Slit Test - Illustration representing light travelling through two small slits and interfering with itself.
To see this in reality, stand on a bridge and look down at waves of water interfering with itself as the columns supporting the bridge block the water at some points making the wave travel around the columns and the new waves collide. If you have a camera, take a picture of it and compare it to this drawing, and it will be identical.
Light travels as a particle (when it’s being observed) and as a wave (when it’s not being observed). This has been one of the beautiful mysteries of light. Since all energy travels through the quantum, then light does indeed travel all possible paths as quantum mechanics predicts. Light travels through (vibrates through) the lattice (or grid like) structure of space-time vibrating all points connected to it.
Space-time is a fractal. A fractal is a shape that when you decompose into pieces, the pieces are the same to the whole. When you decompose space-time (or light) into its smallest pieces (Planck constants) the pieces are the same as the whole. When light travels, the pathways that it travels is through a lattice structure (which is also a fractal) so it’s is correct to say that light travels through all fractal pathways.
The question is, why does light behave as a particle (when you observe it) and as a wave (when it is not being observed)? Just by looking at it, you observe the point that you are looking at, so it behaves as a particle because you are defining it. Light behaves as a particle when it is being observed and amazingly, just because it’s being observed. But when it is not being observed it behaves as a wave, only because it is not being observed. So it appears that observation literally creates reality, which is another beautiful illusion of relativity. So is light a wave or a particle? It is both, depending on whether it is being observed or not. The quirky, elegant, beautiful strangeness of the universe.
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