Homework Help: Double slit experiment

1. Sep 16, 2013

richyw

1. The problem statement, all variables and given/known data

I need to derive the intensity distribution of the double slit experiment. Intensity as a function of the slit separation d, the distance to the screen L and the wavelength $\lambda$. L>>d

2. Relevant equations

3. The attempt at a solution

Ok this is ridiculous but everything I find is just telling me how to find the minimum or maximum. I also need to figure this out for the triple and N slit problems.

I know that intensity is basically the square of the electric field. So I have been trying to make two waves and then add them together and then square them. I keep going wrong here. Is there an online resource that takes this approach?

2. Sep 16, 2013

Staff: Mentor

3. Sep 16, 2013

Staff: Mentor

Please show your work then, so we can see what you did and what went wrong. The basic idea is right.