As we now know, void is not such a void but is filled with quantum fluctuations. It must also have some electromagnetic feature that allows light as a wave to spread with a speed of 300,000 Km per second. Clearly, it has no mass and no charge in a state of energy that could be called repose. But we're being accurate to call it empty?. Vacuum is really empty by the fact that it does not contain any mass. The current answer is no. The void is the medium from which the known universe seems to have emerged. Therefore, we must agree that the void is something and has its own properties and one structure that today is still unknown. This void that can be called physical space is far from intuitive three-dimensional Euclidean space which we usually represent and with which we feel comfortable. It is a medium very different to that space. In fact, in Euclidean space light could not spread and it could be called real vacuum when nothing were in it contained. Thus arises the need to redefine the concept of physical void. We might call real void to that region of space that contains nothing, no mass, nor charge, nor fields, nor fluctuations, absolutely nothing, and consequently the light could not propagate in this real void. It would be really nothing though by the fact of being able to define it, it would be something. Currently whether this real void can exist in the universe is unknown and so if we can obtain it physically. The question is: are we able to create a region of space that contains no mass at which light can not propagate?. Currently we can not. Would it be physically possible?. We do not know.
Copyright Antonio Armero
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