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
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.
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)
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)
VHF = "Very High Frequency" Formally, radio frequencies from 30 MHz to 300 MHz. (Wavelengths between 1 meter and 10 meters)
The frequency of a typical household microwave oven is around 2.45 gigahertz (2.45 billion cycles per second).
Microwave light has a frequency range of approximately 300 MHz to 300 GHz.
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.
The wavelength of a 300 MHz radio wave is approximately 1 meter. Wavelength is inversely proportional to frequency, so as frequency increases, wavelength decreases.