the frequency is about 30 trillion Hz and the wave length about 30 cm to 3 mm. They are used for point-to-point communications to convey all types of information.
frequency of infrared waves is about 3 GHz to 400 THz. Wavelength of the wave is about 30 cm to 740 nm. The most common use is for sensing and detecting things because everything on heart gives off heat.
The frequency of radio waves is about 3 KHz to about 300 GHz. Radio waves have the longest wavelength ranging at 1 mm to more than 100 Km. Radio waves are most commonly used for communication.