1, the frequency is the number of waves passing through the designated place in a fixed time, that is. Therefore, according to the previous wavelength expression, the relationship between wavelength and frequency can be obtained as follows:
2. Wave velocity refers to the distance traveled by a certain vibration state in unit time. Because a certain vibration state of a wave is always associated with a certain phase value, or the distance traveled by a certain vibration phase in unit time is called wave velocity.
Therefore, for single-frequency waves, the wave velocity is also called phase velocity. It is usually represented by C, the international unit is m/s, and the symbol is m/s. According to the different characteristics of waves, it has different specific meanings. The relationship between the wave velocity c=λf of monochromatic wave and the wavelength λ and vibration frequency f of wave source is: c = λ f.
Extended data:
The basic unit of frequency is hertz (Hz), and it is also commonly used as kilohertz (kHz) or megahertz (MHz) or gigahertz (GHz). 1kHz= 1000Hz， 1 MHz = 100000hz， 1GHz= 1000MHz。
Wavelength refers to the distance that a wave travels in a vibration period. That is, the distance between two adjacent points with a phase difference of 2π along the propagation direction of waves. The wavelength λ is equal to the product of the wave velocity u and the period t, that is, λ=uT. Waves with the same frequency travel at different speeds in different media, so their wavelengths are different.
References:
Baidu encyclopedia-wave speed
Baidu Encyclopedia-Frequency
Baidu encyclopedia-wavelength