How long are the wavelengths of far infrared rays How long are the wavelengths of far infrared rays? Please help me with this question.

The range of infrared rays varies according to the requirements of the user.

The three wavelengths that pass through the atmosphere are:

Near-infrared wavelengths, 3 microns

Mid-infrared wavelengths, 5 microns

Far-infrared wavelengths, 14 microns

Wavelengths of 8-14 microns

How long are far-infrared wavelengths?