Infrared radiation has a wavelength range of 700 nanometers to 1 millimeter. This falls between visible light (which has shorter wavelengths) and microwaves (which have longer wavelengths).

Here's a breakdown:

* Visible light: 400 - 700 nanometers

* Infrared: 700 nanometers - 1 millimeter

* Microwaves: 1 millimeter - 1 meter

Keep in mind that this is a general range, and infrared radiation can be further divided into subcategories based on wavelength:

* Near-infrared: 700 - 1400 nanometers

* Mid-infrared: 1400 - 3000 nanometers

* Far-infrared: 3000 - 100,000 nanometers

Infrared radiation plays a crucial role in various applications, including:

* Thermal imaging: Detecting heat signatures

* Remote sensing: Studying Earth's atmosphere and surface

* Medical imaging: Diagnosing injuries and illnesses

* Communication: Fiber optic cables

* Heating: Infrared heaters