# Fringe spacing of the Interference pattern due to two Coherent waves

## Homework Statement:

In the attached image.

## Relevant Equations:

formulas of fringe width and phase differences I think.
Homework Statement: In the attached image.
Homework Equations: formulas of fringe width and phase differences I think.

It has been a long time since I have dealt with these kinds of interference/fringewidth problem, I cant figure out a way to start solving this problem. I was thinking about what the spacing between each of these wave-lines signify, and exactly which of them would create the pattern. Because of its oblique incidence, each wave would individually create patterns, so how do the two patterns make a final one?i think the fringewidth of the final pattern is asked here!

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Because of its oblique incidence, each wave would individually create patterns
No. What makes you think that ?
Equations: formulas of fringe width and phase differences I think.
Way PF works is that you list the relevant equations and post an attempt at solution.
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