I was wondering if anyone could please explain what an intensity diagram would look like if you had a layer of fresh water ontop of x amount of meters of salt water (or vice versa). What is the concept behind this? How could you draw it? The question keeps popping up in past exam questions but i cant seem to find a way to awnser it since i have never been taught intensity diagram with two different substance densitys. Is it complicated or am i making it complicated? Thank you very much!