I think they use glasscocks to achieve the effect ;)
But seriously, they use nanoparticles to mimic the atmosphere's ability to scatter the blue part of the spectrum, which is due to the particular size of the molecules in air (I think they even say this explicitly in the vid). But they can't have nanoparticles the same size as the molecules in the air, cos then they would be, well, molecules, and it would just be a gas. I'm not saying I don't believe them, but I would like to know how they've done it. But of course that wouldn't be commercially wise, I expect.
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FridgeBadger, Wed 18 Feb 2015, 14:50,
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Actually...
You don't need anything too high tech to scatter light and create a moderately convincing sky blue. A box of smoke will do it (not very practical), or a colloidal gel (very practical), so long as the particles are small compared with the wavelength of visible light.
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notoolsovernight you're all luvvly an' 'orrible, Wed 18 Feb 2015, 15:02,
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But to specifically scatter blue light, and not the other colours, you need a pretty specific particle size, right? And if the molecules in air are the right size, any nanoparticle that also only scatters blue light would have to be the same size? Is there another type of scattering other than Rayleigh (Raliegh?) scattering?
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FridgeBadger, Wed 18 Feb 2015, 15:26,
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But..
You don't have to scatter blue light 'specifically'. Scattering is not like a dye or a pigment that has a particular characteristic wavelength or set of wavelengths. Rayleigh scattering affects all wavelengths, it just affects the shorter end of the spectrum (blue) more than the longer end (red). All you need is random particles smaller than about 450nm and nature will do the rest.
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notoolsovernight you're all luvvly an' 'orrible, Wed 18 Feb 2015, 15:39,
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It has to sound like it is worth £120k duh
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gaijintendo Regular Member, Wed 18 Feb 2015, 20:44,
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