Types of Diffraction
Category : JEE Main & Advanced
(1) Fresnel diffraction : If either source or screen or both are at finite distance from the diffracting device (obstacle or aperture), the diffraction is called Fresnel type.
Common examples : Diffraction at a straight edge, narrow wire or small opaque disc etc.
(2) Fraunhofer diffraction : In this case both source and screen are effectively at infinite distance from the diffracting device.
Common examples : Diffraction at single slit, double slit and diffraction grating.
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