What existed and there are ways of information transfer at distance?
About what role is played by information in our world which is promptly rushing somewhere, are told and written much. However, justice of the statement that possession of information is almost equivalent to possession of the world should not be confirmed or disproved especially in correlation at all with the present since at all times the nobility meant to be ahead (often - planets of all).
It is possible to transfer information from one subject (translator) to other (recipient) by a set of ways. That to be convinced of it, rather simply to track evolution of means by means of which people exchanged data at various times.
Long before emergence of transmission media which allowed to pump over data on the distances not comparable to a visibility limit and the audibility of the person, in seconds (and even fractions of a second), representatives of the human race were already able to give each other informing signs through use of visually perceived signals (here it is possible to carry fires, the flag alphabet). Though if to be up to the end fair, then we are obliged to notice: development of speech skills and the invention of writing which allowed the person to say a millennium later about more " became an Alpha and Omega of information exchange between people; advanced “ things.
The series of inventions taking place in the 19th century became the real break in development of means of exchanging by information. At first there was a telegraph (1844, a surname of Morse, I think, speaks to you about something), then followed phone a bit later (1876, the American scientist Bell) and radio (1895, the Russian scientist Popov). In a century “ body “ and “ radio “ new opportunities which were simply inaccessible earlier opened. They put the stone in the fundamental building developed already on a joint of the millennia and known to us as “ formation of information society “.
To realize what matter in human life of a means of communication, many efforts should not be applied. Let`s remember: it was not required to do it to the same Bolsheviks who under the complete control of telegraph and mail began with the translation what as a result became October revolution.
Development of mail throughout history - one more foreshortening under which it is possible to consider formation and improvement of instruments of transfer of news, thoughts, feelings. The integral attributes of correct and reliable work of mail at all times and at all people were the indication of the address of the recipient and the return address (sender), storage and transfer of the most valuable that is in the letter - lines, - in the envelope hiding contents from public eyes. Today even more often word “ " mail; it is used with definition “ electronic “ and, respectively, more and more seldom people resort to sending the hand-written text in paper envelopes, especially in comparison with quicker and providing the bigger choice of means of registration and expansion of content (through various “ attachments “ etc.) letters electronic means of communication.
Conversation on e-mail cannot but turn within the specified subject into conversation on the Internet simply. The worldwide network (not in vain differently called by a web) is more and more courageous and, I would tell, neobratimy entangles itself the planet, leaving to us at the same time less chances to speak about centuries-old barriers - distance and time - as barriers from now on. It can be considered as the computer embodiment of globalization where if told one, then knows already whole world (or almost all: often except for that about whom it was told).
Progress urges on to improvement and long ago the existing means. An example - the concept “ new television “ in which laser technologies find broad application, and for providing the high-quality image and a sound their transfer to recipients is carried out on a fiber-optical cable.
Information transfer “ by air “ i.e. by means of electromagnetic waves (EMI), allows to operate quality transmitted and, respectively, the received signal through manipulations with EMI wavelength (or that is equivalent in physical sense, wave frequency). Perhaps, not far off that time when the television from two-dimensional (two measurements - visual and sound) turns in three-dimensional (information transfer for perception organs of smell of the person). It is obvious that one of the main advantages of use of EMI for information exchange - speed (equal in vacuum of velocity of light, or 300 000 km a second). Physically it was not succeeded to prove a possibility of achievement of bigger speed in the nature yet.
The modern science opens all new opportunities of information transfer (for example, from matter to a light photon). The improvement limit in this area was not found. Anyway, what advanced methods of establishment of communication people with each other would not use, it is necessary to remember the main thing: distortions should not be brought in initial information, and at the exit it has to differ “ purity “.
Reliability, relevance, completeness and some other characteristics of information always were and will be those criteria which will define not only its quality, but also reasonableness to use this or that means of information exchange. In this case the purpose, but not means provided that the last does not create any threat to security of the person is much more important.
Then it will be possible to talk about technical parameters of these strange devices which do our life better. Good luck to you!