RHS antenna
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Fourier optics — is the study of classical optics using techniques involving Fourier transforms and can be seen as an extension of the Huygens Fresnel principle. The underlying theorem that light waves can be described as made up of sinusoidal waves, in a manner… … Wikipedia
WRAD — Infobox Radio station name = WRAD city = Radford, Virginia area = New River Valley branding = 1460 WRAD Radford slogan = Timeless Classics airdate = 1948 frequency = 1460 kHz format = Oldies power = 5000 watts day, 500 watts night erp = class = A … Wikipedia
