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%ما هو (من)٪ 1 - تعريف
ELECTROMAGNETIC FREQUENCIES RANGING FROM 3 KHZ TO 300 GHZ
Radio frequencies; Radio Frequency; Radiofrequency; RF spectrum; Radio frequencies and wavelengths; Radio-frequency; Radio-frequency spectrum; RF stage; Radio Frequencies (table); RF signal; Radio frequemcy; Radio frequency spectrum; Rf wave; Wireless frequency; R.F.; R.f.; Rf.; R F; RF; RF energy; Radio-frequency communication; Radio frequency communication; Radio-frequency current; RF current
radio frequency
¦ noun a frequency or band of frequencies in the range 104 to 1011 or 1012 hertz, suitable for use in telecommunications.
Radio frequency
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around . This is roughly between the upper limit of audio frequencies and the lower limit of infrared frequencies;A.
r.f.
¦ abbreviation radio frequency.
ويكيبيديا
Radio frequency
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around 20 kHz to around 300 GHz. This is roughly between the upper limit of audio frequencies and the lower limit of infrared frequencies; these are the frequencies at which energy from an oscillating current can radiate off a conductor into space as radio waves. Different sources specify different upper and lower bounds for the frequency range.
أمثلة من مجموعة نصية لـ٪ 1
1. Mounted on the buoy are radio–frequency and Global Positioning System antennas for sending data to a NOAA Geostationary Operational Environmental Satellite (GOES) satellite, and a radio–frequency modem.
2. This is a Radio Frequency Identification microchip, which can be read using radio waves.
3. Brain function in adults is not affected by exposure to radio frequency.
4. But overall the radio frequency radiation from modern digital handsets is lower than analogue phones.
5. The most contentious prediction is the spread in the use of Radio Frequency Identification (RFID) technology.