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Why is that AM signals can often be heard behind hills while FM signals cannot?
Wiki User
∙ 10y ago
AM frequencies have long wavelengths, and the ground wave is what is detected. This just decays linearly with distance.
FM frequencies are generally about 100 MHz +/- and have small ground waves, but are too high a frequency to be reflected by the ionosphere. They are essentially line-of-sight signals, though occasionally you'll get a little fringing signal.
Wiki User
∙ 10y ago
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What word is this it cannot be seen cannot be felt cannot be heard cannot be smelt it lies behind stars and under hills and empty holes it fills?
'Time'.
It cannot be seen, cannot be felt, Cannot be heard, cannot be smelt. It lies behind stars and under hills, And empty holes it fills. It comes first and follows after, Ends life, kills laughter?
darkness or emptiness?
It can not be seen it can not be felt cannot be heard cannot be smelt it lies behind stars and under hills and emty holes it fills it comes first and follows after ends life kills laughter?
The answer to this riddle is darkness. It cannot be sensed through the traditional human senses, yet it is all around us. It is often associated with the unknown and can be found in various places, including behind stars and under hills. It symbolizes the beginning and end of life.
How is diffraction used for radio communications?
A radio programme receiver does not need to be directly in view of the transmitter to receive programme signals. For low frequency radio waves diffraction can allow them to be received behind hills, although repeater stations are often used to improve the quality of the signals.
In Esperanza Rising what were the signals Esperanza sees in the crochet quilt?
mountains and hills
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Well really the valleys BETWEEN hills form by glacial and/or other erosion. The hills are what's left behind.
What does BH stand for in BH Cosmetics?
According to their website it's Be Heard and they also use Badass with
Is it true chihuahua were in the Aztecs?
Ya of course...........I think.............I heard this from bervly hills chihuahua......Heheheeh.................I really dont know Ya of course...........I think.............I heard this from bervly hills chihuahua......Heheheeh.................I really dont know
What are the effects of hills on analog signals?
UHF? VHF? AM? HAM bands, CB bands, Trunkers...... I need more info. In general, Analog signals are best at night. This is because the Ionosphere get's extremely charged with protons, thus reflects Analog signals better. Hills can definitely make an impact on signals, and the make-up of the hill is more important than the size. A signal will be able to travel through graphite easier than lead.
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Where does mickey Rourke live?
He lives in the Hollywood hills, and i know this cause i heard him say it in an interveiw not that long ago! obvouisly exactly where in the hills he lives cause that's goin to b abit hard! He lives in the Hollywood hills, and i know this cause i heard him say it in an interveiw not that long ago! obvouisly exactly where in the hills he lives cause that's goin to b abit hard!
Can not be seen can not be felt can not be heard can not be smelt it lies behind stars and under hills and empty holes it fills it come first and fallows after ends life and kills laughter what is it?
Death it's self. Or the Grim reaper as some people call him.
