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What Is infrared radiation?
Infrared radiation is a form of energy that surrounds our everyday lives, even if we cannot see it directly. Sitting just beyond the red edge of the visible spectrum, infrared spans wavelengths from about 700 nanometres (nm) to 1,000,000 nm. Unlike visible light, infrared is experienced chiefly as warmth—whether from sunlight, a heated floor, or even a living being.
Infrared radiation forms part of the electromagnetic spectrum and is divided into three main segments: Near-infrared (NIR): 700–2,500 nm, bordering visible light and commonly exploited for technology and imaging. Mid-infrared (MIR): 2,500–50,000 nm, often associated with chemical analysis and environmental sensing. Far-infrared (FIR): 50,000–1,000,000 nm, linked closely to deep heat applications and climate studies. …
