plane wave

(redirected from Planewave)

plane wave

[′plān ‚wāv]
(physics)
Wave in which the wavefront is a plane surface; a wave whose equiphase surfaces form a family of parallel planes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Plane Wave

 

a wave in which at every moment the displacements and velocities of the particles in a medium (for mechanical waves) or the strengths of the electric and magnetic fields (for electromagnetic waves) are the same at all points lying in any plane perpendicular to the direction of the wave’s propagation.

Strictly speaking, real plane waves do not exist, since a plane wave that propagates along the x-axis must span the entire region of space with y- and z-coordinates from — ∞ to + ∞. In many cases, however, a bounded (with respect to the y- and z-axes) portion of a wave can be found wherein the wave is nearly the same as a plane wave. This is primarily possible in free space at such great distances from the source that the source can be regarded as a point. Sometimes a wave that is propagating in a bounded region may coincide approximately with such a portion of a plane wave. An example is an elastic wave propagating in a rod.

REFERENCE

Gorelik, G. S. Kolebaniia i volny, 2nd ed., ch. 5, subsec. 2, ch. 7, subsec. 3. Moscow, 1959.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

plane wave

A shock wave whose front is normal to the direction of propagation. See normal shock wave.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Exhibitors: Datapath, Hytec Inter, Idirect, Inster, Marlink, Media Broadcast Satellite, PlaneWave Instruments, SCISYS UK, Skyrora, Spectra Group, Teledyne, US Air Force, Xtar
The concept includes an ultra-high performance PlaneWave telescope within a bespoke trailer module.
The model features a PlaneWave telescope inside, reflective lining, a carbon fibre laminate body, winch, roll bars, 20-inch wheels, off-road tires, and a high-intensity roof light bar.
DETAILS: PlaneWave Instruments 12.5-inch CDK astrograph with QSI 640ws CCD camera.
In addition to providing exceptional image quality, this unique technology is the foundation of several innovations which have changed the paradigm of ultrasound imaging: ShearWave Elastography (SWE), UltraFast Doppler, Angio PL.U.S Planewave UltraSensitive Imaging and more recently TriVu.
The planewave solution ([psi] [varies] exp i[phi]) to (4) in the z-direction involves the phase
All calculations of this study are performed with the Vienna Ab initio Simulation Package (VASP) [28, 29], a planewave implementation of density-functional theory (DFT).
By using (2) in (1), we can obtain the commutation relations and planewave expansion of the q-deformed scalar field [[phi].sub.q](x), as follows:
In order to validate the DGM-TM-ME, DGM-TM-WE and DGM-TM-WH implementations we begin with TM planewave scattering from both PEC and penetrable cylinders.
A planewave with an x-directed electric field was launched from the glass substrate along the positive z-direction.
A planewave cutoff of 60 Ry and a Monkhorst-Pack grid of 8 x 8 x 8 for the Brillouine zone integrations are found to converge all the reported quantities.
The core electrons were replaced by ultrasoft pseudopotentials with a planewave basis cutoff energy of 410 eV, and the interactions of exchange and correlation were treated with Perdew-Burke-Ernzerhof parameterization (PBE) of the generalized gradient approximation (GGA).