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Brian Mengel,
Civil Servant
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These frequencies are covered under Part 15 of the FCC rules, which authorize low power unlicensed radio systems.
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Richard Hosking,
Paranormal Investigator
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Because certain radio frequencies pass effortlessly through pesky dust and gas clouds we can now study objects heretofore blocked from our view.
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Rob Verdann,
Afterdark Removalist
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This is like hearing for the first time that there are radio waves existing all around us and then building a radio receiver and transmitter so we can interact with those radio frequencies that are just outside of our 3D senses.
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Jake Farley,
Truck Driver
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HAM Radio Frequencies During the week we were asked for the frequencies for the Ham Radios.
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Dave Simons,
Internet Entrepeneur
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The radios send and receive signals concurrently utilizing different radio frequencies and this allows users to talk simultaneously exactly like on a telephone or other wired intercom.
It is a rapidly emerging technology for computer communications that uses radio frequencies instead of conventional cabling.
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Dan Toomey,
Computer Salesman
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Such cellular radio phone systems use power levels ranging from around 10 mW upto 20 W and frequencies from around 27 MHz upto 1.
Superclock II radio circuits naturally also operate in this range of frequencies but have been designed as if they were operating at considerably higher frequencies of up to 1000 MHz.
Consumer model radios do not require licenses but they share frequencies with all other consumer model users and are subject to interference.
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Arthur Dawkins,
Astro-physicist
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Radio plasma imaging uses total reflection of electromagnetic waves from plasmas whose plasma frequencies equal the radio sounding frequency and whose electron density gradients are parallel to the wave normals.
Although radio frequencies are much lower than optical frequencies, many of the approximations of geometrical optics still hold.
Radio Astronomy is the Science of Astrophysics in the radio spectrum from Low Frequencies to as high as 300 GHz.
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