Phase Front

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Phase Front

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A surface of constant phase (or phase angle) of a propagating wave disturbance. Also called wave front. </dd>
Generally, phase fronts spread out spherically from their source; but in cases where energy is assumed to travel in parallel rays (as in many radiation problems), phase fronts may be approximated as plane surfaces oriented perpendicularly to the rays. [[/a>|/a>]][[/a>|/a> ]]

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use