22 May (Andorra, French Administration ) within release Radio Andorra goes into circulation Stamp Building of Radiostation face value 0.56 Euro
Stamp Building of Radiostation in catalogues | |
---|---|
Yvert et Tellier: | Yt:AD-FR 695 |
Michel: | Mi:AD-FR 716 |
Stamp is square format.
Stamp Building of Radiostation it reflects the thematic directions:
Radio is the technology of communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates oscillating electrical energy, often characterized as a wave. They can be received by other antennas connected to a radio receiver, this is the fundamental principle of radio communication. In addition to communication, radio is used for radar, radio navigation, remote control, remote sensing, and other applications.