The blue color of water is also due to selective absorption of light by the water molecules. This is much different from the scattering of light which is responsible for the blue sky. Quantum mechanics predicts selective absorption of energy by atoms and molecules. The discrete nature of energy levels is required in quantum mechanics. As the frequency increases, energy increases and wavelength decreases.
Color is another qualitative way of describing light.
Go to Dr. Burgess' index page. Go to the Introduction to Physical Sciences Homepage. Go to the Rivier College Homepage.