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The original "mood ring" introduced as the Mood Stone in the summer of 1975. A mood ring is a finger ring that contains a thermochromic element, or "mood stone", that changes colors based on the temperature of the finger of the wearer. Finger temperature, as long as the ambient temperature is relatively constant, is significantly determined by ...
A mood ring is an example of this property used in a consumer product although thermochromism also has more practical uses, such as baby bottles, which change to a different color when cool enough to drink, or kettles which change color when water is at or near boiling point.
"Love Tester" mood rings and necklaces sold over the past five years are being recalled after testing showed they contain high levels of lead, the U.S. Consumer Product Safety Commission said.
The physical uses of temperature sensitive glass is mostly in a visual context. Some shower walls use these glass tiles on the walls so users can observe how hot/cold the water is before entry. [3] Other applications include mood rings, battery condition display and coffee cups.
The year is gradually drawing to a close, which means that the corresponding trends are coming back into fashion: Halloween, Thanksgiving, and then Christmas is not far away.
The mood stone ring was made of sterling silver or vermeil (gold-gilded sterling), whereas the majority of mood rings used base metals, such as copper. Changes in peripheral blood flow (thus finger temperature) caused the liquid crystal to reflect different wavelengths of light, which change the color of the stone.
Myth #4: You can only get a cold in the winter It’s true that colds are more common in the winter. In fact, the CDC says that most people get colds between September and May.
the cold smectic stage is closest to a solid phase where the molecules align themselves into tightly wound chiral matrices. Liquid crystal thermometers portray temperatures as colors and can be used to follow temperature changes caused by heat flow. They can be used to observe that heat flows by conduction, convection, and radiation.
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