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What is this strange holographic fluid dome.
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Yes, it does look a lot like a mood ring. The difference is that a mood ring changes colour with temperature, whereas this changes when you touch the back.
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What is this strange holographic fluid dome.
Hi,
Many years ago, a friend of mine found this little trinket in a science museum gift shop (he thinks) but can't remember exactly where. I would love to buy another, but I can't for the life of me work out what it's called, or where I could buy one.
It's a clear plastic hemisphere. On the flat face is attached a sheet of black rubber, under which is a fluid full of holographic powder. If you touch your finger onto the flat side, you can see the fluid change colour (bottom left image).
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