Finding intensity of fringes from two slits of given width

[naima]

Hi all

I am looking for the intensity of the fringes on the screen behind two slits with a given width.
I thought it would be easy to find with google but no.

 

[sophiecentaur]

Google 'two slit interference'. That should bring on an avalanche of hits. The Hyperphysics site is usually a good source of formulae, although it is sometimes a bit short on chatty explanations (PF is good for that).

 

[naima]

I found a good paper on the subject

 

[sophiecentaur]

That looks to be a good source.
If it suits your level then it's perfect!