Pitkäaaltoista

Pitkäaaltoista refers to long-wavelength radiation, typically in the context of radio waves. Radio waves are a type of electromagnetic radiation with wavelengths ranging from about one millimeter to 100 kilometers. The term "pitkäaaltoista" specifically denotes the longer end of this spectrum, meaning wavelengths greater than approximately 10 meters. These longer wavelengths are associated with lower frequencies. Historically, longwave radio was crucial for broadcasting and communication due to its ability to travel long distances, often over the horizon, and to penetrate obstacles more effectively than shorter wavelengths. This propagation characteristic is due to the way long radio waves interact with the Earth's ionosphere and surface. Examples of longwave frequencies include those used for AM radio broadcasting and some maritime communication. While shorter wavelengths have become more prevalent for many applications due to their higher bandwidth capabilities, longwave technology still finds use in specific areas where its unique propagation properties are advantageous. The electromagnetic spectrum is divided into various regions based on wavelength and frequency, with longwave occupying a distinct and historically significant portion of this spectrum.