Electromagnetic radiation with wavelengths longer than those of visible light but shorter than those of microwaves falls within the range of the infrared spectrum. Here are a few examples of electromagnetic radiation within this range:
Near-infrared (NIR): This is the closest to the visible light range and has wavelengths ranging from about 700 nanometers (nm) to 1,400 nm. NIR radiation is used in applications such as remote controls, fiber optic communications, and some medical imaging techniques.
Mid-infrared (MIR): This region has wavelengths ranging from approximately 1,400 nm to 10,000 nm (or 1 micrometer to 10 micrometers). MIR radiation is commonly used in spectroscopy, thermal imaging, and some industrial heating processes.
Far-infrared (FIR): Also known as terahertz radiation, FIR has longer wavelengths ranging from about 10 micrometers to 1 millimeter. This type of radiation is used in security scanners, non-destructive testing, and scientific research, among other applications.
Submillimeter waves: These have wavelengths ranging from 1 millimeter to 1 centimeter. They are often used in astronomy for studying the cold regions of the universe and for high-frequency communication links.
It's important to note that the boundaries between these regions can vary depending on different sources and applications. Nonetheless, the examples mentioned above represent the general ranges of electromagnetic radiation with wavelengths longer than visible light but shorter than microwaves.