Question

The class of diffraction in which incident and diffracted wave fronts are planar is called:

• A. Fresnel diffraction
• B. Fraunhofer diffraction
• C. Huygens' diffraction
• D. Newton's diffraction

Answer 1

The correct option is B Fraunhofer diffraction

The Fraunhofer diffraction equation is used to model the diffraction of waves when the diffraction pattern is viewed at a long distance from the diffracting object. As it is viewed at a long distance the wavefronts are planar.