Why is the color of ice glaciers blue?
According to the RDPL: Because the orange (long wavelengths) part of white light is absorbed by ice and the blue (short wavelengths) light is transmitted and scattered. The longer the path light travels in ice, the bluer it appears
The purity and age of the ice also play an important factor in the color of ice in glaciers. As the ice ages it is compressed, melted and frozen again eliminating air bubbles that scatter the light rays and bounce them back out in the same color they came in (white). Once the ice becomes pure the light waves are much more likely to be absorbed promoting the deep blue color.
The cross design is modeled after the Danish flag. The color red is said to symbolize the island's active volcanoes; white the ice and snow that covers most of the country, and blue is symbolic of the surrounding Atlantic Ocean. Actually the white represents the glaciers, peace and honesty of the country.
Water's intrinsically blue color is easy to see when the water is sufficiently deep, such as in the Caribbean and Mediterranean Seas, and in Colorado mountain lakes. Pure water and ice have a pale blue color, which is most noticeable at tropical white-sand beaches or in ice caves in glaciers. (Green colors are usually derived from algae.) The blueness of the water is neither due to light scattering (which gives the sky its blue color)…