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Re: [Phys-l] 3D paint



BC,

If they are the ones I've seen, they are simple diffraction gratings. Different colors get offset by different amounts creating a 3D effect.

Check the art section of your nearest Walmart; by the crayons and construction paper.

Paul

On Oct 19, 2011, at 9:42 PM, Bernard Cleyet wrote:


On 2011, Oct 19, , at 17:41, Anthony Lapinski wrote:

Went to a haunted house and had to wear paper goggles during one part to
see 3D dots/images on a wall. Very cool! Had to return the goggles later.
Anyone know how this is done and/or where I can buy these items (paint and
goggles)?


Could you see the dots w/o the goggles, just not 3D?

bc

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