Question

WHat is Fraunhofer diffraction ?​

Answer 1

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Fraunhofer diffraction :-

It occurs because of the short distance in which the diffracted waves propagate and results in a Fresnel number which is greater than 1 (F > 1). When the distance is increased, outgoing diffracted waves become planar and Fraunhofer diffraction occurs.

Answer 2

Explanation:

Fraunhofer diffraction is the type of diffraction that occurs in the limit of small Fresnel number . In Fraunhofer diffraction, the diffraction pattern is independent of the distance to the screen, depending only on the angles to the screen from the aperture.