IRsäteilyllä

IRsäteilyllä, often referred to as infrared radiation, is a type of electromagnetic radiation with wavelengths longer than visible light and shorter than microwaves. It is invisible to the human eye but can be felt as heat. The spectrum of infrared radiation is divided into near-infrared, mid-infrared, and far-infrared, each with distinct properties and applications.

The primary source of infrared radiation on Earth is the Sun. Objects with a temperature above absolute zero emit infrared radiation. This phenomenon is utilized in various technologies, including thermal imaging cameras, which detect temperature differences by sensing emitted infrared radiation. This has applications in security, military, medical diagnostics, and building inspections.

Infrared radiation also plays a significant role in atmospheric science. Greenhouse gases in the Earth's atmosphere absorb and re-emit infrared radiation, trapping heat and contributing to the greenhouse effect. This natural process is essential for maintaining a habitable temperature on our planet, though increased concentrations of these gases due to human activities can lead to global warming.

In industry, infrared heating is employed for processes like drying, curing, and baking. In telecommunications, infrared is used in short-range wireless data transmission, such as in remote controls for televisions and other electronic devices. Medical treatments also utilize infrared radiation for pain relief and tissue healing.