microwave radiation - is electromagnetic radiation, which consists of the following ranges: decimeter, centimeter and millimeter.Its wavelength range from 1 m (frequency in this case is 300 MHz) to 1 mm (frequency of 300 GHz).
wide practical application of microwave radiation received in the method of non-contact heating of bodies and objects.In the scientific world, this discovery is used extensively in the study of outer space.The usual and most known for its use - in home microwave ovens.In heavy industry it is used for heat treatment of metals.
Also today microwave radiation has spread in radar.Antennas, receivers and transmitters in fact - expensive items, but they are well compensated because of the huge information capacity microwave links.Rating of its use in the home and in the production due to the fact that this type of radiation is pervasive, hence heating the object goes inside.
scale electromagnetic frequencies, or rather, its beginning and end, is the two different forms of radiation:
- ionizing (wave frequency greater than the frequency of visible light);
- non-ionizing (radiation frequency lower than the frequency of visible light).
For a person poses a risk uncharged superhigh-frequency radiation, which directly affect human action currents with a frequency of 1 to 35 Hz.Usually uncharged microwave radiation provokes wanton fatigue, cardiac arrhythmia, nausea, decrease in total body tone and a severe headache.Such symptoms should be a signal that is close to a source of harmful radiation, which can cause significant damage to health.However, once a person leaves the danger zone, malaise ceases and these unpleasant symptoms disappear on their own.
Stimulated emission was opened in 1916 a brilliant scientist Einstein.This phenomenon he described as the effect of an external electromagnetic field resulting from the transition of an electron in an atom from the upper energy level to a lower one.Radiation which arises here called induced.He has another name - stimulated emission.Its feature is that the atom emits electromagnetic waves - polarization, frequency, phase, and direction of propagation she same as that of the original wave.
induced radiation, scientists have used as the basis for the modern lasers, which, in turn, helped in the creation of new modern devices - such as quantum hygrometers, intensifiers, and so on. D.
Thanks to the laser, new technical areas - suchas laser technology, holography, non-linear and integrated optics, laser chemistry.It is used in medicine for complex operations on the eyes for surgery.Monochromaticity and coherence of the laser make it indispensable in spectroscopy, isotope separation systems for measuring angular velocity and svetolokatsii.
microwave radiation - is also a radio emission, but it refers to the infrared range, and it has the highest frequency in the radio.With this radiation we face several times a day using a microwave oven to heat food, and talking on a cell phone.A very interesting and important application of it, astronomers have found.Microwave radiation is used to study cosmic background or CMB since the Big Bang, which occurred billions of years ago.Astrophysicists studying the heterogeneity of luminescence in some parts of the sky, it helps to know how galaxies formed in the universe.
