hey all .. i have a few Questions about the radio waves that i need to be answer

Question

hey all ..

i have a few Questions about the radio waves that i need to be answered ..
please help me out ..

. What are names of frequency bands between 300 Hz to 30 GHz?
Please also show some of the application of some frequency bands.


. What is the radio wave? Please explain it.
Also, how can you convert the frequency to wavelength of a wave in free space?
(You can show it by formula and any necessary data)

thanks guys ill appreciate it ..

Explanation / Answer

Band name Abbr ITU band Frequency and wavelength in air Example uses sub-hertz subHz 0 < 3 Hz > 100,000 km Natural and man-made electromagnetic waves (millihertz, microhertz, nanohertz) from earth, ionosphere, sun, planets, etc[citation needed] Extremely low frequency ELF 1 3–30 Hz 100,000 km – 10,000 km Communication with submarines Super low frequency SLF 2 30–300 Hz 10,000 km – 1000 km Communication with submarines Ultra low frequency ULF 3 300–3000 Hz 1000 km – 100 km Communication within mines Very low frequency VLF 4 3–30 kHz 100 km – 10 km Submarine communication, avalanche beacons, wireless heart rate monitors, geophysics Low frequency LF 5 30–300 kHz 10 km – 1 km Navigation, time signals, AM longwave broadcasting, RFID Medium frequency MF 6 300–3000 kHz 1 km – 100 m AM (medium-wave) broadcasts High frequency HF 7 3–30 MHz 100 m – 10 m Shortwave broadcasts, amateur radio and over-the-horizon aviation communications, RFID Very high frequency VHF 8 30–300 MHz 10 m – 1 m FM, television broadcasts and line-of-sight ground-to-aircraft and aircraft-to-aircraft communications. Land Mobile and Maritime Mobile communications Ultra high frequency UHF 9 300–3000 MHz 1 m – 100 mm Television broadcasts, microwave ovens, mobile phones, wireless LAN, Bluetooth, GPS and two-way radios such as Land Mobile, FRS and GMRS radios Super high frequency SHF 10 3–30 GHz 100 mm – 10 mm Microwave devices, wireless LAN, most modern radars, communications satellites Extremely high frequency EHF 11 30–300 GHz 10 mm – 1 mm Radio astronomy, high-frequency microwave radio relay, microwave remote sensing Terahertz THz 12 300–3,000 GHz 1 mm – 100 µm Terahertz imaging – a potential replacement for X-rays in some medical applications, ultrafast molecular dynamics, condensed-matter physics, terahertz time-domain spectroscopy, terahertz computing/communications, sub-mm remote sensing Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Like all other electromagnetic waves, they travel at the speed of light. Naturally-occurring radio waves are made by lightning, or by astronomical objects. The wavelength ? of a sinusoidal waveform traveling at constant speed v is given by ? = c/F where c is velocity of light and F is frequency . c = 3 X 10^8 m/sec.

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