Apparently there is a scientific explanation and reasonable,
αsumber
Have you ever seen ice cubes thoroughly? If so, of course you will find a color difference between the outside with the center of the ice cube.
Clear white color appears on the outside, while in the center / center of the white color is more dense or resemble the color of milk. Yes, right?
But do you know that the middle part is the air bubbles of water purity that come frozen?
In the water is always contained oxygen. That is why marine animals can live. How much oxygen content is used by scientists to measure how healthy an environment is. But this oxygen is the part that makes impurities (impurities) from water.
Water is formed by two elements, namely oxygen and hydrogen. when binding to form H2O compounds.
In a frozen state, water forms a regular crystal structure. Well, components other than H2O are perceived as impurities, which will be pushed increasingly to the core for later freezing. Oxygen that does not bind to other elements is included in the impurities.
You can make ice cubes with a completely clear white appearance, ie by doing oxygen removal (deoxygenation). The trick is to boil water, because with increasing water temperature, the oxygen in it will decrease. Then cool for a while before putting in the freezer.
Then why is the snow all over its part looking pure white? It deals with lighting and surfaces.
With a smooth surface, you can get a reflection of specular light, where all light comes and bounces at the same angle.
While on a wavy surface, you will get diffuse reflections, which means all light bounces at a random angle.
Specular reflection produces shadows the way you look in a mirror, whereas diffusion reflections produce shadows like reflections from paper or white walls.