For the Fraunhofer diffraction to occur, the wave front incident on the aperture must be? 1) spherical 2) plane 3) cylindrical 4) elliptical

1 Answer
May 3, 2018

Please see the explanation below

Explanation:

Fraunhofer diffraction is :

  • Light forms plane waves when reaching the screen

  • long distance from source

  • by converging lens

  • A bright fringe is seen along the axis #(theta=0)# with alternating bright and dark fringes on each side

  • the wavefronts are planar at the aperture

The answer is #option (2)#