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The effect of the trailing edge is to diffract sound waves generated by the leading edge.
This avoided any hard edges in the beam, which could diffract and cause damage.
The beam illuminates the first grating and is then diffracted.
In the case of supersonic aerofoils, the trailing edge diffracts both groups as it catches up with them.
It is observed numerically that an initially diffracting beam is accompanied by oscillatory self-focusing of the beam with distance of propagation.
As the first approximation, the spectrum was assumed to be diffracted in the first-order only.
For some materials, especially diffracting ones, the reflectance measured in some directions varies greatly from the reflectance measured in others.
This paper compares the theory with data obtained during experiments with diffracting shocks.
With zero flow, diffracted waves were spherical as expected.
The objects they encounter will either absorb, reflect or diffract them.
Furthermore, the rhinoceros does not suffer from the quality of the marine medium diffusing and diffracting light, as does the dolphin.
The supersonic patch and the fan are embedded inside an apparently continuous self-similar diffracted wave pattern behind the triple point.
The shock wave is diffracting around the pressure-gauge holder in this figure and the shock wave reflected from the face of the holder is moving back towards the exploding sphere.
Equation (4.12) represents a diffracted field, (4.13) incident and diffracted fields and (4.14) incident, reflected and diffracted fields.
During the equalization of the pressures behind the reflected and diffracted shock waves, a vortex is formed as the flow separates around the front edge of the gauge holder.