Waves and radiations. A radio communication

In 1888 of Hertz has published article in which has described set of remarkable results. It has shown rectilinear distribution of electromagnetic waves, having shown that the metal screen stops iskrenie while an insulator, for example the wooden door, does not interfere with it. Having turned one mirror on 90 °, the Hertz has shown that waves are polarised and, hence, are cross-section. By means of the big zinc plate it has shown reflexion of waves though successful application of mirrors, certainly, already proved existence of this property. The hertz has carried out also refraction of waves, having passed them through a prism from firm bitumen, and has found the indicator of refraction close to 1,7.

The Hertz has laid the foundation for new branch of technics - radio communications.

So the known electromagnetic spectrum has been expanded from lengths of waves of an order of thousand shares of millimetre to metres and tens metres (radio-wave). Since then shorter waves have been received as longer, and. And blanks in a spectrum are filled. Between long infra-red waves and short radio-waves there is no basic difference.

And how business with other end of a spectrum, with area behind an ultraviolet is? Here opening of new kinds of radiation at all was not logic continuation of former researches. It was radiation of an unknown kind - X-rays with so unusual properties what to establish their nature it was possible not at once. It remains a riddle within 17 years, and only then it was possible to find out that it is electromagnetic radiation with lengths of waves, approximately in one thousand times shorter, than lengths of waves of light.