Project on github.

I used pyplot to implement a graphical visualisation of this phenomenon. The idea of this rendering is to give an idea of the behaviour of light intensity, close to the source points and on a distant screen.

image

Some parameters can be changed to show how they influence the result. Reducing the distance between the source points, for instance, shows on the screen that the light pattern is not a sine.

image

image

image

Finally if you add a phase delay between the two sources, you add dissimetry to the result.

image