Hi everyone, this is a really nice question on single slids. I can do part a), since the Intensity is proportional to [f(x)]^2. However, I am completely stuck on part b. If the wave alters in x direction (not uniform) I don't understand how I am supposed to calculate the resulting Intensities in y direction on the path of the dog. Am I supposed to build the time average on each point? If anyone could give me a hint that would be amazing. Thank you!