Looking at water waves: Part 2

You already know that water waves can have different wavelengths and different amplitudes. But there is another way in which waves can be different from each other. Remember https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315193892/2143c097-43f6-474f-b507-c12feffdfd35/content/pg116_1.tif"/>