siinfrapuna

Infrapuna, also known 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 detected as heat. The term "infrared" literally means "below red," referring to its position in the electromagnetic spectrum just below the red portion of visible light.

Infrared radiation is emitted by all objects with a temperature above absolute zero. The hotter an object, the more infrared radiation it emits. This principle is utilized in various applications, such as thermal imaging cameras, which can detect temperature differences and create images based on infrared emissions. These cameras are used in fields like security, firefighting, and medical diagnostics.

The sun is a major source of infrared radiation, contributing to the Earth's warmth. On Earth, natural sources of infrared radiation include fire, lava, and living organisms. Artificial sources include incandescent light bulbs, heaters, and remote controls. The specific wavelengths of infrared radiation are often categorized into near-infrared, mid-infrared, and far-infrared, each with different properties and applications. Near-infrared is closer to visible light and is used in telecommunications and spectroscopy. Mid-infrared is associated with heat signatures and is used in remote sensing and medical imaging. Far-infrared has longer wavelengths and is used in astronomy and in some types of heating.