Long wave and Radio radiation

Long wave noun - A radio wave with a wavelength longer than a kilometer (a frequency below 300 kilohertz).

Radio radiation and long wave are semantically related. In some cases you can use "Radio radiation" instead a noun phrase "Long wave".

Radio radiation noun - An electromagnetic wave with a wavelength between 0.5 cm to 30,000 m.

Long wave and radio radiation are semantically related. Sometimes you can replace phrase "Long wave" with "Radio radiation", this phrases are similar.