Radio Waves
Matthew Davey Per.2
Wavelength Range
They range from the length of a football to larger than our planet.
Frequencey Length
Bands of radio waves
Band
Frequency range
Wavelength range
Low Frequency (LF)
30 to 300 kHz
1 m to 10 km
Medium Frequency (MF)
300 kHz to 3 MHz
100 m to 1 km
High Frequency (HF)
3 to 30 MHz
10 to 100 m
Very High Frequency (VHF)
30 to 300 MHz
1 to 10 m
Velocity In A Vacuum
Other Key Facts
- Radio waves were first predicted by mathematical work done in 1867 by Scottish mathematical physicist James Clerk Maxwell
- His mathematical theory, now called "Maxwells Equation".
- Radio waves were first used for communication in the mid 1890s by Guglielmo Marconi, who developed the first practical radio transmitters and receiver's
Everday Use For Radio Waves
- Mobile Radio Communication
- Broadcasting
- Radar
- Computer Networks
Health Impact
Positive
Negative
Some claims suggest cell phone RFs may instigate brain tumors and even cancer