The radio frequency portion of the electromagnetic spectrum uses radio telescopes.

The radio frequency portion of the electromagnetic spectrum uses radio telescopes.

Spectrum(Monsta Remix) from Spectrum EP. I downloaded the MP3 from Amazon.

No, light is not part of the radio spectrum. But, both the radio spectrum and light are part of the electromagnetic spectrum. The electromagnetic spectrum is a range of frequencies from very low to very high. Light frequencies are higher than radio frequencies but both are the same kind of thing.

Radio waves are the longest of the E-M spectrum. The VLF (very low frequency) part of the radio spectrum is the longest usable part of that spectrum. This goes down to about 10kHz, and these low frequencies are used to communicate with submerged submarines.