Depends on where you are. Each nation has its own rules.
There are legal frequencies in the 125 KHz, 13.56 MHz, 800-950 MHz, and 2.4 MHz bands. Higher frequencies are coming.
ultrasonic wave is sound frequency
2(frequency deviation+signal frequency)
The difference between a radio wave and a x-ray is the fact that x-rays have a much higher frequency. Since higher frequency means more energy in electromagnetic waves, x-rays can be used for purposes such as taking photos of things inside the body. Radio waves are at a lower frequency and have a much longer wavelength. They are used in radio, television, and communication.
The wave length and frequency of course vary, the frequency ranges from 3kHz to 300 GHz. The wavelengths are longer than infrared.
For any wave, frequency x wavelength = speed (of the wave). In this case, convert the kHz to Hz, then divide the speed of light by this frequency. The speed of light should be in meters/second. The answer will be the wavelength in meters.
The RFID chip is a Radio Frequency IDentification chip. When it receives a radio wave in the right frequency range, it sends back a characteristic radio signal which allows it to be specifically identified, much like a bar code would when optically scanned.
ultrasonic wave is sound frequency
Radio waves are lower frequency.
The frequency of a radio wave compares to the frequency of the vibrating electrons that make it because the frequency of a radio wave is proportional to the frequency of the vibrating electrons that make it.
2(frequency deviation+signal frequency)
Gamma ray
Radio Waves.
FM radio is transmitted anywhere in the spectrum of 88Mhz to 108Mhz
Speed, wavelength and frequency.
Energy of radio signal E = hf, Planck's constant times the frequency.
The frequency is 1000000000 Hz.
carrier wave