WHAT IS WAVELENGTH

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When Radio Waves were first discovered and explored the easiest way to classify them was by their wavelength.  Wavelength is roughly the length of the radio wave either from the peak of the wave to the next peak of the wave or from the trough or valley of the wave to the next trough or valley of the wave.  This measurement is usually measured by the metric system.  The common measurements are usually meters or centimeters. 

Using the commonly used United States Amateur Radio Allocations as an example below we can see the wavelengths and frequencies:

• 2200m Band - In the LF Band with a frequency range of 135.7–137.8KHz 
• 630m Band - In the Medium Wave Band with a frequency range of 472–479KHz
• 160m Band - In the Medium Wave Band with a frequency range of 1.8MHz to 2.0MHz
• 80m/75m Band - In the HF Band with a frequency range of 3.5MHz-4.0MHz
• 60m Band - In the HF Band with a frequency range of 5.330MHz-5.405MHz
• 40m Band - In the HF Band with a frequency range of 7.0MHz-7.3MHz
• 30m Band - In the HF Band with a frequency range of 10.1MHz-10.150MHz 
• 20m Band - In the HF Band with a frequency range of 14.0MHz-14.350MHz 
• 17m Band - In the HF Band with a frequency range of 18.068MHz-18.168MHz 
• 15m Band - In the HF Band with a frequency range of 21.0MHz-21.450MHz 
• 12m Band - In the HF Band with a frequency range of 24.890MHz-24.990MHz 
• 10m Band - In the HF Band with a frequency range of 28.0MHz-29.7MHz) 
• 6m Band - In the VHF Band with a frequency range of 50.000MHz-54.000MHz
• 2m Band - In the VHF Band with a frequency range of 144.000MHz-148.000MHz
• 1.25m Band - In the VHF Band with a frequency range of 222.000MHz-225.000MHz
• 70cm Band - In the UHF Band with a frequency range of 420MHz-450MHz
• 33cm Band - In the UHF Band with a frequency range of 902MHz-928MHz
• 23cm Band - In the UHF Band with a frequency range of 1240MHz-1300MHz (commonly referred to as the 1.2GHz Band)