People don’t usually realise that water/ice just isn’t fully colourless, and generally suppose that the sky causes oceans to be blue. In absence of different colouration mechanisms, increased frequency gentle (in direction of ultraviolet) tends to scatter extra successfully than decrease frequency (in direction of infrared), and this occurs each in water and the sky.
The reason for it’s Rayleigh scattering, the place the electrical subject element of sunshine interacts with the fees in molecules smaller than the wavelength, inflicting them to resonate and re-emit the sunshine in random instructions – the larger the resonation, the larger the scattering. This additionally implies that yellow-red gentle makes it via in a better proportion, explaining the yellow color of the Sun, yellow-red dawn/sunsets, and the extra inexperienced color of deep ocean pictures.
The iceberg isn’t blue. It simply seems that approach as a result of the pink (lengthy wavelengths) a part of white gentle is absorbed by ice and the blue (quick wavelengths) gentle is transmitted and scattered.
The cause why most icebergs look white is as a result of the snow absorbs the sunshine as an alternative of refracting it.