Question

2. a tank carrying oil is leaking and spills a large amount of oil (n = 1.40) into the sea. Assume that the refractive index of water is 1.33

a) If the thickness of the oil film is estimated to be 390nm, what color would the sea look like there?

b) In another region of the sea affected by the same oil spill, a deep blue color is observed. What is the thickness of the oil film?

Answer 1

For the waves reflected at the top
surface of the oil film there is
a 180° phase shift. For the waves reflected at the bottom surface of the oil film there is no phase
shift.