- Electromagnetic radiation (often abbreviated E-M radiation or EMR) is a phenomenon that takes the form of self-propagating waves in a vacuum or in matter.
- It comprises electric and magnetic field components, which oscillate in phase perpendicular to each other and perpendicular to the direction of energy propagation.
- Electromagnetic radiation is classified into several types according to the frequency of its wave; these types include (in order of increasing frequency and decreasing wavelength): radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.
- The photon is the quantum of the electromagnetic interaction and the basic "unit" of light and all other forms of electromagnetic radiation and is also the force carrier for the electromagnetic force.
- EM radiation carries energy and momentum that may be imparted to matter with which it interacts.
- If radiation having a frequency in the visible region of the EM spectrum reflects off of an object, say, a bowl of fruit, and then strikes our eyes, this results in our visual perception of the scene. Our brain's visual system processes the multitude of reflected frequencies into different shades and hues, and through this not-entirely-understood psychophysical phenomenon, most people perceive a bowl of fruit.
- At most wavelengths, however, the information carried by electromagnetic radiation is not directly detected by human senses. Natural sources produce EM radiation across the spectrum, and our technology can also manipulate a broad range of wavelengths. Optical fiber transmits light which, although not suitable for direct viewing, can carry data that can be translated into sound or an image. The coding used in such data is similar to that used with radio waves.
- Radio waves can be made to carry information by varying a combination of the amplitude, frequency and phase of the wave within a frequency band.
Electromagnetic Radiations in Humans:
- Man is also emanating energy. However, it is necessary to remember how weak this field is.Signals emitted by the brain constitute one component of this energy. It concerns Extremely LowFrequencies – ELF.
- A cell is the basic, very small unit of the living substance. It measures about 10 microns, i.e. 10-5 m. But, it is still enormous to compare with particles carrying electrical charge (electrons) – there is place for at least 10,000 for them on the cell length and about 30,000 for them on the cell circumference.
- Brain waves have no constant frequency, but their frequency is changing. The whole control system is buried deeply in the brain, in the thalamus. The thalamus is switching and integrating centre of excitements coming from sensors, from the spinal cord and the brain stem to the cerebral cortex. The system is called thalamic rhythmic generator or ”pacemaker”
- EEG has shown that waves do not expand to the brain only, but through the whole nervous system (through the perineural system) and to every part of the organism.
- The brain field can be affected by electrical and magnetic rhythms from outside, natural or artificial.
- Man is emitting electromagnetic energy in the band of interest. This band was situated to the frequency interval of 0.5 – 30Hz.
