Amplitude: Difference between revisions
From Glossary of Meteorology
imported>Perlwikibot (Created page with " {{TermHeader}} {{TermSearch}} <div class="termentry"> <div class="term"> == amplitude == </div> <div class="definition"><div class="short_definition">Often the greates...") |
imported>Perlwikibot (Created page with " {{TermHeader}} {{TermSearch}} <div class="termentry"> <div class="term"> == amplitude == </div> <div class="definition"><div class="short_definition">Often the greates...") |
(No difference)
|
Revision as of 17:25, 26 January 2012
amplitude[edit | edit source]
Often the greatest magnitude at a given point of any spatially and temporally varying physical quantity governed by a wave equation; can also mean the spatial part of a time-harmonic wave function.
For example, in the time-harmonic (or sinusoidal) scalar wave function with circular frequency ω, where φ(x) is the (complex) amplitude of the wave, although the modulus of φ also may be called its amplitude. The (complex) amplitude of the scalar plane harmonic wave with wavenumber k and initial phase θ is A exp(ikx − iθ), the modulus of which, , is also called the amplitude of the wave. In its most general sense, amplitude means extent or size. Thus the amplitude of a wave is some measure of its size.