Water tank and wave interference question?

[Kratos321]

Homework Statement

In a large water tank experiment, water waves are generated with straight, parallel wave fronts, 3.0m apart. The wave fronts pass through two openings 5.0m apart in a long board. The end of the tank is 3.0m beyond the board. Where should you stand, relative to the perpendicular bisector of the line between the openings, if you want to receive little or not wave action?


Ok, so I tried to do this problem and got 0.94 m as my answer. Can someone please confirm this because the answer book says 1.25m.

 

[ideasrule]

1.25 m is about right. At that point, the path length difference is 1.5 m, which is half the wavelength. Maybe you made an algebra error somewhere?

 

[ehild]

Ok, so I tried to do this problem and got 0.94 m as my answer. Can someone please confirm this because the answer book says 1.25m.

How did you get that result?

ehild