Hello, this is my first visit to PF. I have a question that I can tell isn't very difficult, but I can't seem get my head around it, maybe i just need to review my text and make an attempt tomorrow.(adsbygoogle = window.adsbygoogle || []).push({});

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

Consider the point P in the following diagram. Analyze this diagram to show that the equation

|P^n S^1-P^2 S^2| = (n-(1/2))(lambda) is valid for this particular location for the point P.

the ^ indicates a subscript

2. Relevant equations

|P^n S^1-P^2 S^2| = (n-(1/2))(lambda)

3. The attempt at a solution

I haven't made an attempt at a solution, but I am not looking for any answers. If someone could help me understand the problem better, I am sure that I can solve the question.

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# Analyzing wave interference patterns

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