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Radio Waves: Difference between revisions
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==Radio Frequency== | ==Radio Frequency== | ||
We need to understand radio frequency (RF) energy to help protect ourselves from harassment by understanding what is being transmitted into the environment. Radio waves are received and transmitted by antennas, and are often tuned by length. As an example, AM radio frequencies are so long that an antenna 100 feet long isn't long enough for it's wavelength. When you look at a television antenna on a roof top, you are seeing a much shorter antenna, simply because the frequencies range from 50MHz to about 800MHz, or just under the analog cell phone frequency. | [[File:Cont emspec2.jpg|thumb|Electromagnetic Spectrum]] | ||
We need to understand the [[Spectrum of Frequency]] in the Electromagnetic Spectrum and be aware of radio frequency (RF) energy to help protect ourselves from harassment by understanding what is being transmitted into the environment. Radio waves are received and transmitted by antennas, and are often tuned by length. As an example, AM radio frequencies are so long that an antenna 100 feet long isn't long enough for it's wavelength. When you look at a television antenna on a roof top, you are seeing a much shorter antenna, simply because the frequencies range from 50MHz to about 800MHz, or just under the analog cell phone frequency. | |||
Radio waves at lower frequency (50MHz and lower) will bounce off the [[Ionosphere]] and back to earth. Higher frequencies pass into space. Radio frequencies at terahertz frequencies (1,000MHz and higher) may pass through metal. The human body emits these types of frequencies from the life force energy field around it. A person's location in a room can be imaged through walls with the right equipment. | Radio waves at lower frequency (50MHz and lower) will bounce off the [[Ionosphere]] and back to earth. Higher frequencies pass into space. Radio frequencies at terahertz frequencies (1,000MHz and higher) may pass through metal. The human body emits these types of frequencies from the life force energy field around it. A person's location in a room can be imaged through walls with the right equipment. | ||