This bands typically used "Frequency Modulation" (FM) to encode an audio or data signal onto the carrier wave

These radio wave bands are less affected by air so it's used for short range application such as Wifi and Bluetooth

They are extremely high frequency waves and carry a large amount of energy

This is actually made up of a whole range of colors and mixed together

They will pass through most substances and this makes them useful in some industry to see inside things

Most poweful natural sources of ELF/VLF waves

It has a long range and are useful in penetrating water and rock for communication with submarines and inside mines and caves

It results in better signal quality because environmental factors do not affect the frequency the way they affect amplitude

It is given off by the stars, lamps, flames and anything else that's warm