Triple

Target entity: Fresnel diffraction
Context triple: [Kirchhoff diffraction theory, relatedConcept, Fresnel diffraction]

• A. Fraunhofer diffraction
  Fraunhofer diffraction is the far-field diffraction pattern of waves, typically light, observed when both the source and observation screen are effectively at infinite distance or made so with lenses, producing characteristic interference patterns.
• B. Fresnel diffraction theory chosen
  Fresnel diffraction theory is a wave-optics framework that describes how light diffracts when source or observation distances are finite, using near-field approximations derived from the Huygens–Fresnel principle.
• C. Kirchhoff diffraction theory
  Kirchhoff diffraction theory is a classical wave optics framework that models light propagation and diffraction by treating wavefronts as superpositions of secondary spherical waves emitted from an aperture.
• D. Huygens–Fresnel principle
  The Huygens–Fresnel principle is a fundamental concept in wave optics that explains how every point on a wavefront acts as a source of secondary wavelets whose interference determines the wave’s subsequent propagation and diffraction.
• E. Airy disk
  An Airy disk is the central bright spot in the diffraction pattern formed when light passes through a circular aperture, fundamentally limiting the resolving power of optical systems.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.