What accrual reasons behind water color?

The ocean is not blue just because it reflects the sky. The ocean is mostly blue because water itself is blue. In a journal of chemical educational paper titled"why is water blue?"by charles L.brun and Sergei N.Smirnov, water is shown to have a slight intrinsic blue color. It takes a large quantity of water like in the ocean,for humans to notice the blueness . In household uses ,like when drinking a glass of water,we use far to water to notice it's blueness. As a result we think it is always clear . According to Braun and Smirnov,water absorb red light due to vibrational transition of the molecules ,leaving the blue light to reflect back. For the same reason,large number of snow and ice also blue tinge. Sensitive laboratory equipment verifies the faint blue color of water even when only a cupful is present.

• Note that if the surface is calm and you look at in form a low viewing angle,then some of the blue color on the water surface is the reflection of the sky. But the reflection of the sky doesn't totally account for blueness of water.

                          

                           Imran Islam Shovon

                           Chemistry department, SUST