Radioaaltosäteily

Radioaaltosäteily, also known as radio waves, refers to electromagnetic radiation with wavelengths longer than infrared radiation. These waves occupy the portion of the electromagnetic spectrum from about 30 hertz (Hz) to 300 gigahertz (GHz). Radio waves are generated by oscillating electric charges and are typically produced by antennas. They travel at the speed of light and can penetrate various materials, although their propagation characteristics depend on frequency and the environment.

The applications of radioaaltosäteily are extensive and integral to modern society. They are fundamental to wireless communication technologies, including radio and television broadcasting, mobile phone networks, Wi-Fi, and satellite communications. Radar systems, which use radio waves to detect objects and determine their distance and speed, are employed in aviation, meteorology, and defense. Radio astronomy utilizes radio waves emitted by celestial objects to study the universe. In medicine, radiofrequency ablation is used for therapeutic purposes.

The health effects of radioaaltosäteily are a subject of ongoing research and public discussion. Non-ionizing radiation, which includes radio waves, does not have enough energy to directly damage DNA. However, at high intensities, radio waves can cause heating of biological tissues. International and national health organizations, such as the World Health Organization (WHO) and the International Commission on Non-Ionizing Radiation Protection (ICNIRP), set exposure guidelines to protect the public and workers from potential adverse effects.