Rayleigh criterion


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Rayleigh criterion

[′rā·lē krī‚tir·ē·ən]
(chemistry)
The criterion for spontaneous pressure oscillations to accompany combustion, namely, that combustion progresses more rapidly or efficiently during the compression phase of the pressure oscillation than during the rarefaction phase.
(optics)
A criterion for the resolving power of an optical instrument which states that the images of two point objects are resolved when the principal maximum of the diffraction pattern of one falls exactly on the first minimum of the diffraction pattern of the other.
References in periodicals archive ?
In calculations of the current with the adiabatic upper boundary, volumetric energy release was varied, it was selected in such a way as to provide the following values of the Rayleigh criterion: [Ra.sub.i] = 2 x [10.sup.16] ([Ra.sub.1]), [Ra.sub.i] = 3 x [10.sup.16] ([Ra.sub.2]).
For this mode, Figure 11 shows the instantaneous velocity field and the instantaneous distribution of the dimensionless temperature, with a Rayleigh criterion of 3.5 x [10.sup.16] for the LES turbulence simulation.
The surface density, [alpha], density of thick disk, p, and stability of thick disks through of specific angular momentum or Rayleigh criterion (Rayleigh, 1917), and (Landau, 1987) were calculated.
Adopting this value, we can use the wavefront aberration formula given earlier to recast the traditional Rayleigh criterion: