Some images:

== Interference ==
==== Two Point Light Sources (Double Slit) ====
attachment:doubleslit.png

==== Three Point Light Sources (Triple Slit) ====
attachment:threeslit.png

==== Four Point Light Sources (Quad Slit) ====
attachment:fourslit.png


== Diffraction ==

==== Circular Aperture ====
attachment:circularAperture.png

==== Square Aperture ====
attachment:sqaureAperture.png