Into what three categories is the infrared portion of the spectrum divided?

The correct categorization of the infrared portion of the spectrum is into Near Infrared, Intermediate Infrared, and Far Infrared. This classification reflects the different wavelength ranges and the associated characteristics of infrared radiation.

The Near Infrared region spans wavelengths just beyond the visible light spectrum, facilitating applications such as optical communications and remote sensing. The Intermediate Infrared region encompasses wavelengths that are typically used in thermal imaging and various industrial applications. Finally, the Far Infrared region, which is further along the spectrum, is associated with thermal radiation, often utilized in heat detection and in certain types of astronomical observations.

Understanding these categories is important because they help in determining how infrared radiation interacts with different materials and how it can be harnessed in various technologies. This distinction is essential for applications in fields such as telecommunications, astronomy, and thermal imaging.