When two mechanical waves have a displacement in the same direction, and they overlap, what will the resulting wave look like and why? answer is not b i need though and dont guess it needs to be correct the new wave will have the same displacement as the original waves due to constructive interference. the new wave will have a smaller displacement than either of the original waves due to destructive interference. the new wave will have a greater displacement than either of the original waves due to constructive interference. the new wave will have the same displacement as the original waves due to destructive interference.