+244 The gulf oil spill puts an oil film (refractive index = 1.45 ) with a thickness 280 nm on top of some salt water (index of refraction = 1.35). The sun (white light) shines on this from directly above and an observer in an aircraft sees a sheen. What is the primary color/wavelength of the the reflected light?
A.green (541 nm)
B.blue (470 nm)
C.yellow (572 nm)
D.blue-green (493 nm)
E.violet (404 nm)
