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Interference
Light with light
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Wave guide
Carrying the light
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Balance
With cans
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Elastic energy
Bouncing higher up
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Optical elements
Gelatine
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Colour
White
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Center of mass
Spinning
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Soapy
Interference
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Benham´s
Disk
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Feeling
Sound
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Shape memory
Plastic
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Thermal sheet
Strange plastics