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In optics, Rayleigh proposed a well-known criterion for angular resolution. His derivation of the Rayleigh–Jeans law for classical black-body radiation later played an important role in the birth of quantum mechanics (see ultraviolet catastrophe). Rayleigh's textbook The Theory of Sound (1877) is still used today by acousticians and
A very simple mechanism of acoustic amplification was first identified by Lord Rayleigh in 1878. [4] [5] In simple terms, Rayleigh criterion states that amplification results if, on the average, heat addition occurs in phase with the pressure increases during the oscillation. [1].
Rayleigh-type λ −4 scattering can also be exhibited by porous materials. An example is the strong optical scattering by nanoporous materials. [ 23 ] The strong contrast in refractive index between pores and solid parts of sintered alumina results in very strong scattering, with light completely changing direction each five micrometers on ...
Lord Rayleigh, in his book, gave the correct explanation of how the sound is stimulated. [7] The flow of air past the gauze is a combination of two motions. There is a uniform upwards motion of the air due to a convection current resulting from the gauze heating up the air. Superimposed on this is the motion due to the sound wave.
Clinging to the walls the sound should decay in intensity only as the inverse of the distance — rather than the inverse square as in the case of a point source of sound radiating in all directions. This accounts for the whispers being audible all round the gallery. Rayleigh developed wave theories for St Paul's in 1910 [6] and 1914. [7]
"Acoustic radiation pressure produced by a beam of sound". The Journal of the Acoustical Society of America. 72 (6): 1673– 1687. Bibcode:1982ASAJ...72.1673C. doi:10.1121/1.388660. Hasegawa T, Kido T, Iizuka T, Matsuoka C (2000). "A general theory of Rayleigh and Langevin radiation pressures". The Journal of the Acoustical Society of Japan (E).
The term Rayleigh–Lamb waves embraces the Rayleigh wave, a type of wave that propagates along a single surface. Both Rayleigh and Lamb waves are constrained by the elastic properties of the surface(s) that guide them. Figure 1: Upper and lower, respectively: Extensional (S 0) mode with / =.
The Keller–Miksis equation takes into account the viscosity, surface tension, incident sound wave, and acoustic radiation coming from the bubble, which was previously unaccounted for in Lauterborn's calculations. Lauterborn solved the equation that Plesset, et al. modified from Rayleigh's original analysis of large oscillating bubbles. [6]