18 September 2017 98 3K Report

The reason for formulating the Question:

The question raised by I.C. Teixeira is relevant, and puts in evidence how limited is our knowledge and understanding of the Universe we live in.

From an engineering point of view, we observe reality (the physical world in which we live), we try to understand it, mainly using a cause-effect perspective, we propose a scientific theory, and we try to prove our allegations using abstract models to describe what we observed.

For instance, we observe an attractive force between physical bodies. Sir Isaac Newton brilliantly discovered the Gravitational field, and elegantly proposed a first-order model to measure the gravitational force between two bodies, of mass m1 and m2 at a distance d. The well-known formula F=G m1.m2/square(d) describes the value of such force.

As I understand it, the existence of matter as we know it is the cause behind the effect – the gravitational field. The mass is the model parameter that describes the quantity of matter of a body, made of chemical elements and compounds, well ‘classified’ in the Mendeleev Table of Elements. So, really the existence of the physical matter we find in Nature has an effect – these bodies influence themselves, through an attractive force – Gravitation.

However, we observe that not only attractive forces exist between bodies. In fact, there are repulsive forces too. This is very fortunate, because otherwise if only attractive forces exist, the Universe would finally collapse, or implode. Hence, our observation leads us to another reality of matter. The repulsive forces are the effect of another field of influence among bodies – what we came to call the Electromagnetic Field (EM).

What is the cause behind the EM field? Well, James Clerk Maxwell was a genius who observed these effects, and identified two types of electric charges, which can either exhibit an attractive or repulsive force, depending on the fact that they are of opposite or equal polarity, respectively. Maxwell equations brilliantly describe the EM field and the resulting forces. Again, we are very fortunate to live in such Universe, because information flow and life ultimately depends on it.

So, the reason for my question.

What is the characteristic of matter that we refer as “electric charge”?

What are the physical phenomena that originate such EM fields?

While mass is the model parameter that describes the quantity of matter of a body, what is the physical reality in matter behind what we refer as an electric charge?

Why elementary particles (protons) exhibit an opposite polarity of other elementary particle (electrons)?

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