- #1
RedX
- 970
- 3
For diffraction you can assume slits in screens contain sources for the diffracted waves.
But for a slit of finite width, how far apart are the sources? If the sources are continuously placed in the gap, then that means there are an infinite number of sources. An infinite number of sources with little spacing between them only produces a beam in one direction, and you won't get any diffraction.
But for a slit of finite width, how far apart are the sources? If the sources are continuously placed in the gap, then that means there are an infinite number of sources. An infinite number of sources with little spacing between them only produces a beam in one direction, and you won't get any diffraction.