infrapunasäteitä

Infrapunasäteily, often referred to as infrared radiation or IR radiation, is a type of electromagnetic radiation with wavelengths longer than visible light and shorter than microwaves. Its wavelength range is typically considered to be from about 700 nanometers to 1 millimeter. Infrapunasäteily is invisible to the human eye, but it can be felt as heat.

All objects with a temperature above absolute zero emit infrapunasäteily. The hotter an object is, the more intensely it radiates infrared energy. This principle is utilized in various technologies, such as thermal imaging cameras, which can detect temperature differences and create images based on infrared emissions.

Common sources of infrapunasäteily include the sun, heat lamps, and even the human body. In everyday life, it plays a role in phenomena like the warmth felt from a radiator or sunlight. Applications of infrapunasäteily are diverse, ranging from remote controls for televisions to industrial heating processes and medical diagnostics. It is also used in scientific research for spectroscopy, to analyze the composition of materials. The study and application of infrapunasäteily fall under the branch of physics known as thermology.