extremely low-frequency radiation
Quick Summary
Extremely low-frequency (ELF) radiation refers to electromagnetic waves with very low frequencies, typically below 300 Hz. These waves are of particular interest for communication systems, especially for submarines, because they are weakly absorbed by seawater.123
Electromagnetic radiation, including ELF, is generated by electric charges and interacts with them. While different frequencies of electromagnetic radiation have distinct characteristics and applications, ELF waves are notable for their ability to penetrate significant depths of water, making them suitable for long-range underwater communication.32
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