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Comment from: [Member]

Eyes of Frost is one cool photo, Jon. Great!

- Mark

01/22/10 @ 22:18
Comment from: [Member]

Thanks Mark.

Too bad there wasn’t a circle cut in half under the eye. When I find that one, we’ll have “frost scream". Actually, that’s a bit hard to say.

01/23/10 @ 00:33
Comment from: [Member]

Edvard Munch in the frost ;-)

01/23/10 @ 10:20
Comment from: Jon Nelson [Visitor]
Jon Nelson

Thinking about things crystallographically, having the network of parallel, hexagonal forms lying between regions of curving ice of opposite curvature makes some sense.

To see why, assume that the crystallographic orientation (i.e., where the hexagonal surface sits in relation to the car hood surface) is completely determined by something called the “c-axis". (Strictly speaking, two axes are needed, but the second one here is unimportant.)

In the center, the c-axis points straight up, off the hood. Charles Knight found in his experiments that the initial ice growth in the film grows outward along its branches such that the c-axis of newer ice regions are more nearly straight up. The curvature of the branches also relates to the tilt of the c-axis. On each eyelid, the axis tilts toward the center region. In the center region the tilt lies in-between, which is straight up, likes poles leaning against a flagpole.

This doesn’t explain the pattern. It just tells us why the hexagonal forms lie in the middle of the eye.

12/02/10 @ 17:40
Comment from: art [Visitor]

This is truly great stuff, Jon! And its so much more erudite, more informative than what I do. If I get into that topic again, I HAVE to reference your work here!

01/22/13 @ 07:11

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