The wave angle  is computed using

The wave angle  is computed using the irrotationality of the wave number:

Results (Chinese Traditional) 1:

波角度使用波數的無旋計算：

Results (Chinese Traditional) 2:

波角 = 使用波數的不旋轉度計算：

Results (Chinese Traditional) 3:

使用波數的旋轉性來計算波角：