Radio waves are a form of
electromagnetic radiation that can
radiate through the oxygen-nitrogen environment of Class M worlds
without being significantly absorbed by the atmosphere. Radio waves are
commonly divided into 8 different categories by their
electromagnetic
frequency:
| |
Very Low Frequency VLF: |
3-30 kHz |
3-30 (103
hertz) |
| |
Low Frequency LF: |
30-300 kHz |
30-300 (103
hertz) |
| |
Medium Frequency MF: |
300-3000 kHz |
300-3000 (103
hertz) |
| |
High Frequency HF: |
3-30 MHz |
3-30 (106
hertz) |
| |
Very High Frequency VHF: |
30-300 MHz |
30-300 (106
hertz) |
| |
Ultra High Frequency UHF: |
300-3000 MHz |
300-3000 (106
hertz) |
| |
Super High Frequency SHF: |
3-30 GHz |
3-30 (109
hertz) |
| |
Extremely High Frequency EHF: |
30-300 GHz |
30-300 (109
hertz) |
Above 300 GHz, the absorption of
electromagnetic radiation by a Class M planet's atmosphere is so great
that it is effectively opaque to higher
frequencies, excluding the
infrared and
visible light
frequency ranges.
Radio waves are commonly produced by
artificial technologies associated with intelligent civilizations native to
Class M worlds. They can be easily shielded against and present little
danger to organic tissue. |
