Creeping wave: Difference between revisions
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Creeping waves greatly extend the [[ground wave]] [[wave propagation|propagation]] of long [[wavelength]] (low frequency) radio. They also cause both of a person's ears to hear a [[sound]], rather than only the ear on the side of the head facing the origin of the [[sound]]. In [[radar]] ranging, the creeping wave return appears to come from behind the target. | Creeping waves greatly extend the [[ground wave]] [[wave propagation|propagation]] of long [[wavelength]] (low frequency) radio. They also cause both of a person's ears to hear a [[sound]], rather than only the ear on the side of the head facing the origin of the [[sound]]. In [[radar]] ranging, the creeping wave return appears to come from behind the target. | ||
The term creeping wave was first coined by [[Walter Franz]] in 1952.<ref name=":0" /><ref>{{Cite journal |last=Franz |first=W. |last2=Deppermann |first2=K. |date=1952-03-17 |title=Theorie der Beugung am Zylinder unter Berücksichtigung der Kriechwelle |url=https://onlinelibrary.wiley.com/doi/10.1002/andp.19524450606 |journal=Annalen der Physik |language=en |volume=445 |issue=6-7 |pages=361–373 |doi=10.1002/andp.19524450606 |issn=0003-3804}}</ref> [[Vladimir Fock]] made important contributions to the understanding and calculation of creeping waves. They are described by [[Airy function]]s. | The term creeping wave was first coined by [[Walter Franz]] in 1952.<ref name=":0" /><ref>{{Cite journal |last=Franz |first=W. |last2=Deppermann |first2=K. |date=1952-03-17 |title=Theorie der Beugung am Zylinder unter Berücksichtigung der Kriechwelle |url=https://onlinelibrary.wiley.com/doi/10.1002/andp.19524450606 |journal=Annalen der Physik |language=en |volume=445 |issue=6-7 |pages=361–373 |doi=10.1002/andp.19524450606 |issn=0003-3804|url-access=subscription }}</ref> [[Vladimir Fock]] made important contributions to the understanding and calculation of creeping waves. They are described by [[Airy function]]s. | ||
==References== | ==References== | ||
Latest revision as of 21:27, 23 June 2025
Template:Short description Template:More citations needed According to the principle of diffraction, when a wave front passes an obstruction, it spreads out into the shadowed space. A creeping wave in electromagnetism or acoustics is the wave that is diffracted radially around the surface of a smooth body such as a sphere.[1]
Creeping waves greatly extend the ground wave propagation of long wavelength (low frequency) radio. They also cause both of a person's ears to hear a sound, rather than only the ear on the side of the head facing the origin of the sound. In radar ranging, the creeping wave return appears to come from behind the target.
The term creeping wave was first coined by Walter Franz in 1952.[1][2] Vladimir Fock made important contributions to the understanding and calculation of creeping waves. They are described by Airy functions.