I'll call this snowflake "The Evil Jester", and I'm pretty sure it's easy to see why. The perfect thickness of bubbles and ice combine to bring some crazy colours to the center of this snowflake! View large!
The very center of this snowflake is solid and transparent. Cavities in the thin side of the snowflake formed on the smaller corners and then re-sealed themselves to form the three yellow-greenish bubbles in the center. Growth conditions changed again to create more cavities in the ice, the next time occurring on all sides. As the thickness of these bubbles / cavities change, the related thickness of the ice above and below the bubbles change - this is important!
The thickness of the ice affects how light interacts with it, creating different colours through the phenomenon known as thin film interference. This is not very common in snowflakes, but it can create some very vibrant and unexpected designs in a snowflake. These patterns are also only visible when light reflects off the surface of the ice, and are invisible at most angles.
Want more fun snowflake facts, or want to try and photograph them yourself? You'll need a copy of Sky Crystals: http://www.skycrystals.ca/ - 304 pages all about snowflakes!
- Andy's Imagination Landwriter, present
- London Central High School1993 - 1995
- Bahrain School1991 - 1993
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