Radio

Radio is the use of radio waves is to carry information, such as sound, by systematically modulating some property of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.

Radio systems need a transmitter to modulate (change) some property of the energy produced to impress a signal on it, for example using amplitude modulation or angle modulation (which can be frequency modulation or phase modulation). Radio systems also need an antenna to convert electric currents into radio waves, and vice versa. An antenna can be used for both transmitting and receiving. The electrical resonance of tuned circuits in radios allow individual stations to be selected. The electromagnetic wave is intercepted by a tuned receiving antenna. A radio receiver receives its input from an antenna and converts it into a form usable for the consumer, such as sound, pictures, digital data, measurement values, navigational positions, etc. Radio frequencies occupy the range from a 3 kHz to 300 GHz, although commercially important uses of radio use only a small part of this spectrum.

Baltic

Baltic may refer to:

Geography

Northern Europe

North America

People and their languages

Polskie Radio

Polskie Radio Spółka Akcyjna (PR S.A.; English: Polish Radio) is Poland's state-owned national publicly funded radio broadcasting organization. It is headed by politically appointed managers and hence its coverage is considered as biased towards government.

History

Polskie Radio was founded on 18 August 1925 and began making regular broadcasts from Warsaw on 18 April 1926.

Czesław Miłosz, recipient of the 1980 Nobel Prize in Literature, worked as a literary programmer in Vilnius for Polish Radio in 1936.

Before the Second World War, Polish Radio operated one national channel – broadcast from 1931 from one of Europe's most powerful longwave transmitters, situated at Raszyn just outside Warsaw and destroyed in 1939 due to invasion of German Army – and nine regional stations:

Baltic Sea

The Baltic Sea is a sea of the Atlantic Ocean, enclosed by Scandinavia, Finland, the Baltic countries, and the North European Plain. It includes the Gulf of Bothnia, the Bay of Bothnia, the Gulf of Finland, the Gulf of Riga, and the Bay of Gdańsk. The sea stretches from 53°N to 66°N latitude and from 10°E to 30°E longitude. A mediterranean sea of the Atlantic, with limited water exchange between the two bodies, the Baltic Sea drains through the Danish islands into the Kattegat by way of the straits of Øresund, the Great Belt, and the Little Belt.

The Baltic Proper is bordered on its northern edge, at the latitude 60°N, by the Åland islands and the Gulf of Bothnia, on its northeastern edge by the Gulf of Finland, on its eastern edge by the Gulf of Riga, and in the West by the South-Swedish part of the Scandinavian Peninsula.

The Baltic Sea is connected by artificial waterways to the White Sea via the White Sea Canal and to the German Bight of the North Sea via the Kiel Canal.

Definitions

In the Morning

In the Morning is the title of:

Songs