(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://img337.imageshack.us/img337/285/64902163.png [Broken]

2. Relevant equations

[tex]\Delta x = \frac{\lambda L}{d}[/tex]

where delta x is the fringe separation

L is the distance from screen to signal source

d is the slit separation

3. The attempt at a solution

Okay you see I'm using the equation from the double-slit experiment (should I?) But I cannot draw an analogy between double-slit experiment and the situation here. Am I on the right track?

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# Homework Help: An interference question

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