On page 33 of Sean Carroll book, "The Particle at the End of the Universe" he tells us that "The physicist John Wheeler once proposed a challenge: How can you best explain Quantum mechanics in five words or fewer? In the modern world, it’s easy to get suggestions for any shortanswer question: Simply ask Twitter, the microblogging service that limits posts to 140 characters. When I posed the question about quantum mechanics, the best answer was given by Aatish Bhatia (@ aatishb): “Don’t look: waves. Look: particles.” That’s quantum mechanics in a nutshell."
Quantum Mechanics I: The key experiments and waveparticle duality 
When Einstein was asked about the consequences of this particle wave dichotomy he replied "It seems as though we must sometimes use one theory and sometimes the other, while at times we may use either. We are faced with a new kind of difficulty. We have two contradictory pictures of reality; separately neither of them fully explains the phenomena of light, but together they do"
For example the paradoxical wave–particle reality of energy/mass, one of the fundamental concepts defining Quantum mechanics defies the "reality" of the world we live in because of its inability to describe/define how quantumscale objects can simultaneously exist as waves and particles. Many have tried to explain it as a fundamental property of the Universe, while alternative interpretations explain it as an emergent, secondorder consequence of various limitations of the observer.
But Aatish Bhatia answer to Sean question brings up another troubling aspect of the reality behind quantum. How does the intervention of an observer force a particle to "choose" a state and how does it know when someone is observing it.
However Einstein may have provided us with an answer to both of these questions when he define the physical relationship between energy and mass in terms of the equation E=mc^2 and the geometry of spacetime.
In other words, using the concepts developed by Einstein one may be able to derive a single reality for the waveparticle duality of the quantum world and how an observer interacts with it in terms four dimensional spacetime.
However it will be easier to understand how by redefining Einstein’s spacetime environment to its equivalent four "spatial" dimension counterpart because it will allow us to derive them in terms of the observable properties of the Spatial Dimensions instead not observable temporal ones of a spacetime dimension.
Einstein gave us the ability to do this when he used the velocity of light to define the geometric properties of spacetime because it allows one to convert a unit of time in his four dimensional spacetime universe to a unit of a space identical to those of our threedimensional environment. Additionally because the velocity of light is constant it is possible to defined a one to one correspondence between his spacetime universe and one made up of four *spatial* dimensions.
In other words the symmetry of his mathematics means that he provided a qualitative and quantitative means of redefining his spacetime universe in terms of the geometry of four *spatial* dimensions and the curvature or displacement he associated with the energy of a quantum system in a spacetime environment to a spatial displacement in a fourth *spatial* dimension.
However defining its dimensional properties in terms of its spatial instead of its time components would allow one to not only understand why a quantum environment possess two distinct realities but also why observation determines which reality becomes predominate by extrapolating the laws governing cause and effect in the classical world to them.
For example the article “Why is energy/mass quantized?” Oct. 4, 2007 showed one can derive quantum properties of energy/mass by extrapolating the laws of classical wave mechanics in a threedimensional environment to a matter wave on a "surface" of a threedimensional space manifold with respect to a fourth *spatial* dimension.
Briefly it showed the four conditions required for resonance to occur in a classical environment, an object, or substance with a natural frequency, a forcing function at the same frequency as the natural frequency, the lack of a damping frequency and the ability for the substance to oscillate spatial would occur in one consisting of four spatial dimensions.
The existence of four *spatial* dimensions would give a matter wave the ability to oscillate spatially on a "surface" between a third and fourth *spatial* dimensions thereby fulfilling one of the requirements for classical resonance to occur.
These oscillations would be caused by an event such as the decay of a subatomic particle or the shifting of an electron in an atomic orbital. This would force the "surface" of a threedimensional space manifold to oscillate with the frequency associated with the energy of that event.
The oscillations caused by such an event would serve as forcing function allowing a resonant system or "structure" to be established space.
Therefore, these oscillations in a "surface" of a threedimensional space manifold would meet the requirements mentioned above for the formation of a resonant system or "structure" in fourdimensional space if one extrapolated them to that environment.
Classical mechanics tells us the energy of a resonant system can only take on the discrete or quantized values associated with its fundamental or a harmonic of its fundamental frequency.
Hence, these resonant systems in four *spatial* dimensions would be responsible for the discrete quantized energy associated with the quantum mechanical systems.
Yet it also allowed one to derive the physical boundaries of a particle in terms of the geometric properties of four *spatial* dimensions.
For example in classical physics, a point on the twodimensional surface of paper is confined to that surface. However, that surface can oscillate up or down with respect to threedimensional space.
Similarly an object occupying a volume of threedimensional space would be confined to it however, it could, similar to the surface of the paper oscillate “up” or “down” with respect to a fourth *spatial* dimension.
The confinement of the “upward” and “downward” oscillations of a threedimension volume with respect to a fourth *spatial* dimension is what defines the spatial boundaries of the resonant system associated with the particle "reality" of its wave properties in the article “Why is energy/mass quantized?” Oct. 4, 2007.
In other words one can use classical wave mechanics to explain why a quantum system can possess both wave and particle properties.
However it also tells us how the intervention of an observer forces a quantum system to "choose" a state or how it "knows" when someone is observing it.
As was mentioned earlier its particle reality of is the result of it’s wave energy being confined to a specific volume.
However in every case, observing a quantum system requires one to confine its energy to the specific volume associated with the observing equipment. Therefore it will always display its particle reality when someone looks or observes it.
However if no one is looking at it its wave reality is free to move, interact and interfere with other quantum systems until they are observed and then they will revert to the back their particle realty as when observed in the double slit experiment.
In other words the reason why the particle reality of a quantum system takes the form an interference pattern associated with a wave in Thompson’s double slit experiment is because its wave reality can interact before it is observed and the act of observing it results in its wave reality being presented as a particle interference pattern.
Additionally it gives consistent explanation of why one can sum up quantum mechanics in these words "Don’t look: waves. Look: particles" by extrapolating the "single" physically reality of our observable environment to one consisting of either four dimensional spacetime or four spatial dimensions.
It should be remember that Einstein’s genius and the symmetry of his mathematics allows us to choose whether to define the reality of a quantum system in either a spacetime environment or one consisting of four *spatial* dimension.
Later Jeff
Copyright Jeffrey O’Callaghan 2015
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