Презентация на тему Types of radio waves

at the speed of light
transferred through space energy emitted

from an electromagnetic oscillation generator
born at the change of the electric field
characterized by frequency, wavelength and power portable energy

TV
Radio transmission
For space communications
For sea communications

Transmission data and medicine
For radiolocation and radionavigation

via an antenna

the transmission of long-wave broadcasting stations

can be taken at a distance of several thousand kilometers

medium wave stations are audible within a thousand kilometers.

The energy of the short waves dramatically decreases as the distance from the transmitter.

study of short and ultrashort waves showed that they quickly disappear when you go near the Ground. When the direction radiation upward short wave back

and absorption in the atmosphere.  on the propagation of waves

shorter than 1 cm are affected by fog, rain, clouds, strongly limiting the communication range.