 It is mathematically easier to consider the case of far-field or Fraunhofer diffraction, where the point of observation is far from that of the diffracting obstruction, and as a result, involves less complex mathematics than the more general case of near-field or Fresnel diffraction.To make this statement more quantitative, consider a diffracting object at the origin that has a size formula_1.For definiteness let us say we are diffracting light and we are interested in what the intensity looks like on a screen a distance formula_2 away from the object.