FREQUENTLY ASKED QUESTIONS

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Good to know

How can I have the field strength measured at my home or in my neighborhood?


A request should be forwarded to ATCI who, after analyzing the request, if necessary shall conduct a site measurement. The individual who wants to perform an action in his home can also use the services of a firm accredited by ATCI because the compliance with the measurement protocol set by the agency ensures the objectivity of the results.

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Non-ionizing radiation

What is a non-ionizing radiation?

An electromagnetic wave is associated with a certain energy. Larger the wavelength is (that is, when the frequency is small), lower is the amount of elemental energy exchanged (the photon) with the environment. Conversely, as the wavelength decreases (and therefore when the frequency increases), greater is the elementary quantity of energy. This means that as the frequency increases, the photon transported is energetic. For this high-frequency radiation, the amount of energy transported is such that the links between atomic nuclei and electrons can be broken thus creating an ionization of the atom: that is known of ionizing radiation. Any other type of radiation is called non-ionizing. You can find ionizing radiation in excess of 10 million billion Hz in frequency, about one hundred millionth of a meter wavelength. Among the sources of ionizing radiation (UVR high energy X and gamma rays) there are cosmic rays (charged particles very fast from the interstellar medium: the sun, supernovae, ...), natural radioactivity or not, radiology X etc.. Fields of very low radio waves frequency up to microwave frequencies, and infrared waves, visible and ultraviolet low-energy are part of non-ionizing radiation.
The radiations used for the provision of telecommunications services are non-ionizing

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Wave

What is a wave?
 
In general, we can define a wave as a disturbance moving in a given environment, without transport of matter with this wave. This disturbance produces on its way a reversible variation of local physical properties. The wave is a way of representing a physical phenomenon, and thus applies to very different fields: include mechanical waves (earthquakes, spring, waves), sound waves, shock waves, the electromagnetic waves ...

For example, movements that agitate a stretched rope are also waves: if you give one tip of the rope a jerk, you will see a distortion of the rope (the disturbance), move to the other tip. It is once again a disturbance that moves, that is called a wave.
Similarly, to quote another classic example, if you place a paper boat in a pond and you throw a stone nearby, it will create a wave, propagating the disturbance of the surface water. Throwing the stone, the height of the surface water has changed. This change of the height is conveyed around, until arriving at the paper boat, which is lifted from the bottom up, but that does not move on the surface. The water moves only vertically, not horizontally. This example also allows us to demonstrate that the material in which the wave propagates does not move.

Similarly, an electromagnetic wave only changes the characteristics of the electromagnetic field, making them oscillate around their initial value. An electromagnetic wave can propagate in both vacuum and material media. The speed of an electromagnetic wave depends on the environment it traverses. Light is the most obvious and best known of electromagnetic waves.
Light travels through space at a speed of about 300 000 km / s, it takes for instance 8 minutes and 20 seconds to reach us from the sun.

 

 Learn more about waves... 

 

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