radionõrgud

radionõrgud is an Estonian term that translates to "radio waves" or "radio frequencies." It refers to the part of the electromagnetic spectrum that ranges from about 30 hertz (Hz) to 300 gigahertz (GHz). These waves are a form of electromagnetic radiation produced by the oscillation of electric charges.

Radio waves have a wide range of applications, most notably in wireless communication. They are used to transmit information through radio and television broadcasts, mobile phone calls, Wi-Fi, radar systems, and satellite communications. The specific frequency used for each application is carefully chosen to avoid interference and optimize signal transmission.

The properties of radio waves, such as their wavelength and frequency, determine their behavior and suitability for different purposes. Longer wavelengths can travel further and penetrate obstacles more easily, making them useful for long-distance broadcasting. Shorter wavelengths, on the other hand, are better for high-bandwidth applications like Wi-Fi and mobile data.

While primarily known for communication, radio waves also have applications in scientific research, such as radio astronomy, where telescopes detect radio waves emitted by celestial objects to study the universe. They are also used in medical imaging techniques like MRI. Exposure to high-intensity radio waves can cause heating of tissues, but the levels used in most common applications are considered safe.