An electromagnetic field is a phase state of matter in the form of an invisible dispersed medium that fills all space. The smallest particles of the environment of the electromagnetic field - gravitons - continuously move at the speed of light. One should distinguish between the concepts of the field medium as a whole and the specific manifestations of this medium in the form of flows and disturbances. The rotational flows of gravitons is a magnetic field. The translational flow of the electromagnetic field we consider an electric field. Divergent vortex flows we know as transverse radio waves. The white noise of the field medium we record as microwave background radiation. Longitudinal waves in the medium arising from accelerations and shock perturbations of space objects, we now call gravitational waves. We are convinced of the existence of an electromagnetic field as a global environment whenever we bring a mobile phone to our ear.
We can only measure strength, i.e. pressure gradient or shock. We cannot measure the parameters of a homogeneous medium. Please look at the wire drawings. There is no current on the left - the magnetometer needle is at zero. In the center, the current flows. The magnetometer needle is deflected. On the right, we have placed a second current-carrying wire that flows in the opposite direction. The magnetometer needle is again at zero, although the flow rate has doubled. Can this kind of field flux be measured?
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