As a kid, when it was my turn to do the dishes, it would take me
forever. The reason? I would play with the bubbles. My favorite
pastime during this ritual was to gently blow on large bubbles, watching
them perform a unique dance of colors and swirls on the surface. They
eventually reached a strange grey mottled look, and not too long
afterwards would become completely invisible until they inevitably
burst. Now if Pentax could only come up with a super-multi coating that
could achieve that last stage!
rg
Don Williams wrote:
Ice is amorphous -- like glass -- but reflective. The rainbow effect is
probably caused the layer of water on the surface. Compare this to a
film of oil on water. The thickness of the film will determine the
color that is reflected. The thinnest of films will reflect almost
silver; after this -- as it gets thinner it will become grey; a film of
about 50Å or less becomes invisible. The rainbow colours you can see are
between deep blue-violet and dark red (370 Å deep violet - 730 Å dark
red). The Å unit is old fashioned, but so am I. These days one uses
Nanometres to convert ad a zero.
Don
Jostein wrote:
Hi Don,
Your crystal pics are lovely.
It's interesting to see that many of your crystals produce the same
palette of
colours in polarised light as do natural ice.
Of course, ice can be regarded as a crystal lattice of water, but in
ice I've
only seen this effect in cracks; where the lattice is broken by force.
I've
never seen it on the surface, like it seems to be in your crystals.
Jostein
Quoting Don Williams <[EMAIL PROTECTED]>:
If anyone is interested in polarized light there's a new (Red) button
on my website front page labeled 'Prints'.
This leads to a gallery of crystal images taken with the *ist D.
Don W
--
Dr E D F Williams
_______________________________
http://personal.inet.fi/cool/don.williams
See feature: The Cement Company from Hell
Updated: Print Gallery -- 16 11 2005
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