Holes
There are two frequencies involved here. Call them x and y. When one is much larger than the other you get horizontal or vertical waves. If they are nearly equal you can see both types of waves.
Refactor 2022 #20
Holes
There are two frequencies involved here. Call them x and y. When one is much larger than the other you get horizontal or vertical waves. If they are nearly equal you can see both types of waves.