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Grade: 12
        
what is  Fresnel and Fraunhofer diffraction
4 years ago

Answers : (4)

noogler
489 Points
							
Fraunhoffer: we can observe it if b2/l/\
FResnel: we can observe it if b2/l/\ ~1
4 years ago
rahul
211 Points
							

Fraunhofer Diffraction

Fresnel Diffraction

Wave fronts Planar wave fronts Cylindrical wave fronts
Observation distance Observation distance is infinite. In practice, often at focal point of lens. Source of screen at finite distance from the obstacle.
Movement of diffraction pattern Fixed in position Move in a way that directly corresponds with any shift in the object.
Surface of calculation Fraunhofer diffraction patterns on spherical surfaces. Fresnel diffraction patterns on flat surfaces.
Diffraction patterns Shape and intensity of a Fraunhofer diffraction pattern stay constant. Change as we propagate them further ‘downstream’ of the source of scattering.
4 years ago
rahul
211 Points
							
u can check out the complete answer using the inspect element tool by F12
4 years ago
morden
33 Points
							
okzzzzzzzzzzz
4 years ago
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