Electromagnetic Waves With The Longest Wavelengths And Lowest Frequencies
Electromagnetic waves with the longest wavelengths are radio waves. Radio waves have wavelengths ranging from several meters to thousands of kilometers, making them the longest wavelength electromagnetic waves in the electromagnetic spectrum.
These long-wavelength radio waves are used for various purposes, including communication, broadcasting, radar, navigation, and scientific research. Due to their long wavelengths, radio waves can propagate over long distances and penetrate obstacles such as buildings and foliage, making them suitable for long-range communication and broadcasting.
Examples of devices that utilize radio waves include AM and FM radios, television antennas, mobile phones, Wi-Fi routers, satellite communication systems, and radar systems.
Electromagnetic waves with the lowest frequencies are extremely low frequency (ELF) waves. ELF waves have frequencies ranging from 3 Hz to 30 Hz, making them the lowest frequency electromagnetic waves in the electromagnetic spectrum.
ELF waves are primarily used for communication with submarines, as they can penetrate seawater to significant depths. They are also used in some scientific research applications and for certain industrial purposes.
It’s worth noting that while ELF waves have the lowest frequencies in the electromagnetic spectrum, there are also other extremely low frequency (ELF) waves used for various purposes, such as industrial heating, medical therapies, and scientific research. These waves have frequencies slightly higher than 30 Hz but are still considered to be in the extremely low frequency range.
