Yttrium2
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color and iridescence
Remember the dress that was going around?
I thought maybe it was iridescent.
For iridescent objects, such as a dress that looks black from one angle, and blue from another, what is happening to the light? If only green light
hit the iridesecent object what would happen?
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vmelkon
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You mean like satin
http://en.wikipedia.org/wiki/Satin
Probably it is like the thin film effect where some light wavelengths cancel each other or can't get out and some get into the surface and get out.
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Yttrium2
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Can anyone elaborate on this?
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Yttrium2
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Like sequin
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nezza
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Colour is produced by pigments which absorb light of certain wavelengths when illuminated by white light, for example grass absorbs red and blue so
appears green. Iridescence is caused by microscopic anomalies on the surface of an object that interfere with light causing the rainbow effect you see
with a cd or the metallic blue colours of morpho butterfly wings. Illuminated by green monochromatic light the butterfly wing would be black and the
cd black and green in stripes.
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battoussai114
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This dress:
It's been around the web for a while and people have been arguing a lot if it's whether blue and black or white 'n gold. (though it's clear it's blue
and black).
And no, it isn't iridescence the culprit. The theory I've accepted is that what happens seems to be related with the fact that the brain has color
compensation just like video equipment. Based on clues on the ambient light the brain corrects the color you perceive so things look the same color
under any type of lighting.
Due to the poor lightning and color balance on this photo each person brain is responsible for "reasoning" with the clues it has, and depending on
what color your brain interpret as the one that was present on this scene when the picture was taken is what causes people to perceive different
colors.
Due to this when the your
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Metacelsus
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What, you mean it's not blue and gold? 
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elementcollector1
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I definitely perceive gold, there's no way that top strip could be black.
Doesn't this also have something to do with how many cones you have in your eyes? Most people have three, some (like me) have four, and some have just
two.
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Etaoin Shrdlu
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It's genuinely blue and black, that's the only color they made that dress in. Just a very poor picture.
I can't tell at all what it is just by looking, my brain flips between the two. If the dress is shadowed from the backlight it's white and gold/brown,
if the front is lit too it's blue and black.
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Morgan
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I bought a linen shirt the other day that is sort of a khaki-light brown color with just a hint of straw color to it. In the house or outside in
direct sunlight it looks uniform in color. But outside in indirect sunlight you can see a palm-sized spot about the 3rd button down that seems faded
or where the dye didn't take. It's just very strange. Thanks Sri Lanka. ha
[Edited on 15-3-2015 by Morgan]
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