What's the difference between far infrared ray and infrared ray?

Wavelength of electromagnetic wave, application.

1. Wavelength of electromagnetic wave: Far infrared ray is the longest section of infrared ray, with a wavelength range of 1.5 to 400 microns, while infrared ray has a wider wavelength range of 0.75 to 1 000 microns.

2. Application: Far infrared rays are used in many fields, such as agriculture, medical treatment and industrial treatment, and infrared rays are also widely used in various fields, such as photography, heating and infrared spectrometer.