Question

Depict spatial evolution of Fresnel diffraction pattern.

19 Jan 2026
Answer :
Word Count : 269
Fresnel diffraction occurs when a wavefront encounters an obstacle or aperture and the distance between the aperture and the observation screen is finite, unlike Fraunhofer diffraction where the screen is effectively at infinity. In Fresnel diffraction, the wavefront curvature plays a significant role, and _________ ____ _____ __________ _______ _________ ________ __________ ___ __________ _____.
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