Electromagnetic spectrum and Radio spectrum

Electromagnetic spectrum noun - The entire frequency range of electromagnetic waves.

Radio spectrum and electromagnetic spectrum are semantically related In some cases you can replace phrase "Radio spectrum" with "Electromagnetic spectrum", this phrases are similar.

Radio spectrum noun - The entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television.

Electromagnetic spectrum and radio spectrum are semantically related in electromagnetic frequencies topic. You can use "Electromagnetic spectrum" instead a noun phrase "Radio spectrum".