Difference between revisions of "Evanescent"
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==Origin== | ==Origin== | ||
[[Latin]] evanescent-, evanescens, present participle of evanescere | [[Latin]] evanescent-, evanescens, present participle of evanescere | ||
| − | *[ | + | *[https://en.wikipedia.org/wiki/18th_century 1717] |
==Definition== | ==Definition== | ||
*1: tending to vanish like vapor | *1: tending to vanish like vapor | ||
Latest revision as of 00:37, 13 December 2020
Origin
Latin evanescent-, evanescens, present participle of evanescere
Definition
- 1: tending to vanish like vapor
Description
An evanescent wave is a nearfield standing wave with an intensity that exhibits exponential decay with distance from the boundary at which the wave was formed. Evanescent waves are a general property of wave-equations, and can in principle occur in any context to which a wave-equation applies. They are formed at the boundary between two media with different wave motion properties, and are most intense within one-third of a wavelength from the surface of formation. In particular, evanescent waves can occur in the contexts of: optics and other forms of electromagnetic radiation, acoustics, quantum mechanics, and "waves on strings".
