It's called ultra high frequency, of UHF.
It seems you are talking about radio waves. The wavelength (40 m) multiplied by the frequency (7 million / second) must equal the speed of light (300 million meters/second). It seems that in this example numbers, either the wavelength or the frequency, or both, are not expressed with a great accuracy. For example, if 40 meters is exact, the frequency would be close to 7.5 MHz.
Not possible ! MHz is a measure of frequency, km is a unit of distance - while gigabits is a quantity of memory.
Those two units are completely unrelated. Meter is a measure of length, Hertz is a unit of frequency (reciprocal of seconds).
400-470 mhz = -70
5 MHz = 1 second divided by 5.000.000 4.77 MHz = 1 second divided by 4.770.000
The frequency can range between 300 MHz and 300 GHz.
Ultra high frequency designates electromagnetic waves with frequencies between 300 MHz and 3 GHz or 3,000 MHz.
30 MHz to 300 MHz
30 Mhz - 300 Mhz
Ultra high frequency designates electromagnetic waves with frequencies between 300 MHz and 3 GHz or 3,000 MHz.
LF - Law Frequency (10 to 300 KHz)MF- Medium Frequency (300 to 3000 KHz)HF- High Frequency (3 to 30 MHz)VHF- Very High Frequency (30 to 300MHz)UHF - Ultra High Frequency (300 to 3000MHz)
The frequency can't be 30 Mhz 30 Mhz is a ham radio frequency but to calculate the wavelength, devide 300 by the frequency in Mhz that will give you 10 meters (300/ƒ)
VHF = "Very High Frequency" Formally, radio frequencies from 30 MHz to 300 MHz. (Wavelengths between 1 meter and 10 meters)
The so-called "2 meters" Amateur radio allocation is the band of 144 - 148 MHz in the US. Frequencies from 30 to 300 MHz are tagged 'VHF'. 'VF' typically means 'voice frequency' and is irrelevant to this discussion. "HF" = 3 to 30 MHz. "UHF" = 300 to 3000 MHz.
Microwaves are electromagnetic waves with wavelengths ranging from lambda = 1 mm to 1 m, that are frequencies between f = 300 MHz and 300 GHz.
Wavelength is calculated in MHz not Hz, and the formula is Wavelength = 300 / MHz
"Meters" is not frequency. It's wavelength. If you know the wavelength in meters, divide 300 by it, and the result is the frequency in MHz. If you know the frequency in MHz, divide 300 by it, and the result is the wavelength in meters.