A boat has green light of wavelength l = 500 nm on the mast. What wavelength would be measured and what colour would be observed for this light as seen by a diver submerged in water by the side of the boat? Given nw = 4/3.
(A) Green of wavelength 500 nm
(B) Blue of wavelength 376 nm
(C) Green of wavelength 376 nm
(D) Red of wavelength 665 nm