- #1

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## Homework Statement

## Homework Equations

destructive interference occurs at 0.5(lambda), (3/2)(lambda),...

## The Attempt at a Solution

I found the path difference to be:

d=sqrt(4+x^2)-x

and this has to be equal to (n)(lambda)/2 where n is an odd integer for destructive interference

this does not work out algebraically for me...as the x^2-x^2=0

is this path difference not correct?

do I just use f(n)=(nv)/(2d) to find d?