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The gamma ray has the shortest wavelength (and shortest period) as well as the highest frequency (and highest energy) of all forms of electromagnetic radiation. That's the parâ¦t of the spectrum that we call gamma rays.
Electromagnetic Spectrum with 30+ answers. 0.1 Hz is the lowest frequency detected (3,000,000km wavelength) RADIO WAVES below 22 kHz. 3-30Hz are actually used for communications with submarines but most of the radiation at this long wavelength are produced by the earths magnetic field and lightning.