Infrared light is a type of invisible electromagnetic radiation with wavelengths longer than visible light but shorter than microwaves. It is commonly experienced as heat, as objects that emit infrared radiation feel warm to the touch. The sun is a natural source of infrared light, and many devices like heaters, remote controls, and thermal cameras use it. In healthcare, infrared light is used in therapy to improve blood circulation, reduce pain, and promote healing of muscles and joints. It penetrates the skin and gently warms tissues, helping relax muscles and relieve stiffness. Infrared technology is also widely used in night vision equipment and industrial applications.
