I have the following question: A disabled tanker leaks kerosene (n = 1.20) into the Persian Gulf creating a large slick on the top of the water (n = 1.30). a) If you looking straight down from an aeroplane, while the sun is overhead, at a region of the slick where the thickness is 460 nm, for which wavelength(s) of visible light is the reflection brightest because of constructive interference? b) If you are scuba diving directly under this same region of the slick, for which wavelength(s) of visible light is the transmitted intensity strongest? I understand that some of the rays will be reflected and some absorbed by both mediums. I found this formulae somewhere in my lecture notes but im not sure what the 'I's mean: I/I0 = ((n1 - n2)/(n1 + n2))^2 Ive been trying to slug this question out for ages and its frustrating because i kinda know what is going on just dont know how to quantify it, help is much appreciated - cheers.