> In fact, the equations used to determine how intensely sunlight would be focused by a magnifying glass are the same equations used to determine how a canyon w

> In fact, the equations used to determine how intensely sunlight would be focused by a magnifying glass are the same equations used to determine how a canyon would focus wave energy, he says. For those curious, the concept in physics is intensity [0], essentially power per unit area. Can be used to describe all sorts of waves, including ocean waves. [0]: https://en.m.wikipedia.org/wiki/Intensity_(physics) https://en.m.wikipedia.org/wiki/Intensity_(physics)