The size of the Airy disk generated by this phenomenon defines Rayleigh's distinguishability criterion Typically classified based on the relative size of the optical system to the wavelength as either Fresnel or Fraunhoffer, for 10 points, identify this physical phenomenon in which light bends around an obstacle.
One formalism of this phenomenon delineates a region and then evaluates an integral on it under the assumption that the field and its normal derivative vanish everywhere except the openings in the region, in which they are equal to the incident values. In one configuration, the intensity distribution produced by this phenomenon is proportional to the square of the sinc function; the location of the first zero of that function define a criterion according to which a system is limited by this phenomenon. This phenomenon, one model of which is Kirchhoff's scalar theory, will occur in crystals when twice the product of the plane spacing and the sine of the incident angle is an integral multiple of the wavelength, according to Bragg's Law. The size of the Airy disk generated by this phenomenon defines Rayleigh's distinguishability criterion Typically classified based on the relative size of the optical system to the wavelength as either Fresnel or Fraunhoffer, for 10 points, identify this physical phenomenon in which light bends around an obstacle.
One formalism of this phenomenon delineates a region and then evaluates an integral on it under the assumption that the field and its normal derivative vanish everywhere except the openings in the region, in which they are equal to the incident values.
diffraction