Schwarzkopf taft titan guardare estremamente forti capelli styling gel recensioni

by MiF, - 27.02.2017

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An electromagnetic field also EMF or EM field is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field. The electromagnetic field extends indefinitely throughout space and describes the electromagnetic interaction. It is one of the four fundamental forces of nature the others are gravitation, weak interaction and strong interaction.

The field can be viewed as the combination of an electric field and a magnetic field. The electric field is produced by stationary charges, and the magnetic field by moving charges currents ; these two are often described as the sources of the field. The way in which charges and currents interact with the electromagnetic field is described by Maxwell's equations and the Lorentz force law.

From a classical perspective in the history of electromagnetism, the electromagnetic field can be regarded as a smooth, continuous field, propagated in a wavelike manner; whereas from the perspective of quantum field theory, the field is seen as quantized, being composed of individual particles. In the past, electrically charged objects were thought to produce two different, unrelated types of field associated with their charge property.

An electric field is produced when the charge is stationary with respect to an observer measuring the properties of the charge, and a magnetic field as well as an electric field is produced when the charge moves, creating an electric current with respect to this observer. Over time, it was realized that the electric and magnetic fields are better thought of as two parts of a greater whole — the electromagnetic field.

Untilwhen the Danish physicist H. There are different mathematical schwarzkopf taft titan guardare estremamente forti capelli styling gel recensioni of representing the electromagnetic field. The first one views the electric and magnetic fields as three-dimensional vector fields. These vector fields each have a value defined at every point of space and time and are thus often regarded as functions of the space and time coordinates.

As such, they are often written as E x, y, z, t electric field and B x, y, z, t magnetic field. If only the electric field E is non-zero, and is constant in time, the field is said to be an electrostatic field. Similarly, if only the magnetic field B is non-zero and is constant in time, the field is said to be a magnetostatic field.

However, if either the electric or magnetic field has a time-dependence, then both fields must be considered together as a coupled electromagnetic field using Maxwell's equations. When an EM field see electromagnetic tensor is not varying in time, it may be seen as a purely electrical field or a purely magnetic field, or a mixture of both. However the general case of a static EM field with both electric and magnetic components present, is the case schwarzkopf taft titan guardare estremamente forti capelli styling gel recensioni appears to most observers.

Observers who see only an electric or magnetic field component of a static EM field, have the other electric or magnetic component suppressed, due to the special case of the immobile state of the charges that produce the EM field in that case.

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