1. Diffraction

3. DIFFRACTION S S A B FIG 1.1

6. Diffraction by single slit,& its pattern.

11. Fresnel diffraction Fraunhofer diffraction S S

16. Bragg Diffraction

20. Single Slit Diffraction Notice that central maximum is twice as wide as secondary maxima Sin  = m  / W, Destructive Dark Fringes on screen y = L tan  L (m  W  Maxima occur for y= 0 and, y  L (m  1/2)(  W  m=1 m=  1 L