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Do magnetars emit audible LW AM radio waves that can be heard on receivers?
On 16 Jul, 02:45, Radium wrote:
On Jul 15, 11:52 am, "George Dishman" wrote: http://en.wikipedia.org/wiki/Heliosphere Both the material within the region and the ISM are almost entirely ionised so are in a form known as "plasma", a soup of charged particles. One of the feautures of plasma is that is absorbs low frequency signals below what is called the "plasma cutoff frequency". Basically below the VHF band, space becomes increasingly opaque and signals from stars don't reach us. Okay so it seems like a no win-situation here. Too low and plasmas will cut it off. Too high and you lose strength really fast. http://www.terabeam.com/support/calc...space-loss.php From the above link, it seems that a higher-frequency radio wave would lose its strength faster than a lower-frequency radio wave of the same original strength would. That link is only relevant for a fixed size antenna. See my other post on the waterhole and the 408 MHz band. George |
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