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## Homework Statement

The diagram above shows a single slit with lines marking the direction to a point P in the diffraction pattern. Two wavelets at x and y pass through the edges of the slit as shown. The possible value for path difference, py-px, that places P at the second nodal line next to the central maximum is?

## Homework Equations

## The Attempt at a Solution

I'm not sure if its (5

**λ)/2**or something else.

Just to clarify: Maximas are lcoated where a nodal line is formed(and of which a nodal line is just a line passing through points of constructive interference)

So if it is two nodal lines away from the central maximum, that would mean its at the third maximum starting from the first.

Am i correct?

(If it is only one nodal line, will it be 3

**λ/2? I think so.)**