Classification of Diffraction

1.	Classification of Diffraction
Answer» The bending of light at the edge of an obstacle and hence its encroachment into the region of geometrical shadow is known as “diffractionof light”.Classification of diffraction phenomena: ... They are (1) Fresnel class ofdiffractionand (2) Fraunhofer class ofdiffraction. We can define two distincttypes of diffraction: (a) Fresneldiffractionis produced when light from a point source meets an obstacle, the waves are spherical and the pattern observed is a fringed image of the object. (b) Fraunhoferdiffractionoccurs with plane wave-fronts with the object effectively at infinity.

Answer»

The bending of light at the edge of an obstacle and hence its encroachment into the region of geometrical shadow is known as “diffractionof light”.Classification of diffraction phenomena: ... They are (1) Fresnel class ofdiffractionand (2) Fraunhofer class ofdiffraction.

We can define two distincttypes of diffraction: (a) Fresneldiffractionis produced when light from a point source meets an obstacle, the waves are spherical and the pattern observed is a fringed image of the object. (b) Fraunhoferdiffractionoccurs with plane wave-fronts with the object effectively at infinity.

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