# Difference between revisions of "Radiation condition"

(Created page with "A prescribed value of a solution or its derivative or some combination on a mathematical surface in a problem. Such a surface need not be the confining surface of a finite vol...") |
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− | + | When a medium is ''unbounded'' the surface | |

− | + | which contains it is taken to be infinitely distant from the source and receiver. ''Radiation conditions'' are the [[Dictionary:Boundary condition]]s for | |

− | + | a ''boundary at infinity.'' The result is to prevent energy from coming from infinity and to enforce the requirement that the | |

− | + | general trend of propagation is outgoing from the source. A radiation condition is necessary to guarantee a unique solution in physical sciences problems. | |

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+ | One common radiation condition is called the [[Sommerfeld radiation condition]]. |

## Latest revision as of 14:02, 5 January 2021

When a medium is *unbounded* the surface
which contains it is taken to be infinitely distant from the source and receiver. *Radiation conditions* are the Dictionary:Boundary conditions for
a *boundary at infinity.* The result is to prevent energy from coming from infinity and to enforce the requirement that the
general trend of propagation is outgoing from the source. A radiation condition is necessary to guarantee a unique solution in physical sciences problems.

One common radiation condition is called the Sommerfeld radiation condition.