What is Triboluminescence and How Does it Work?

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Triboluminescence is a phenomenon where light is emitted when certain materials are mechanically stressed, such as when a mercury-filled barometer is shaken. The discussion highlights an example involving a doughnut-shaped glass object filled with pure neon and mercury, which glows when tilted. This effect is similar to historical observations, such as those made by astronomer Jean-Felix Picard in 1675. The glowing occurs due to static electricity generated by the movement of mercury within the glass. Overall, triboluminescence is a fascinating intersection of physics and materials science.
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Hi all, I have had this on my mind for awhile now.
My dad used to make neon signs for a living and one day a man came in and showed him a doughnut shaped glass object. When he would tilt it it would start to glow, which surprised my dad because he had never seen something like that before. To clarify, there were no electrodes or power source attached. The man said he used pure neon and put a blob of mercury into the glass. On the bottom of the doughnut shaped object it was ribbed. From what I have read, it seems like it could be triboluminescence. To be honest I am just very curious how this would work. The man said that they were used by the navy in the ocean, the waves would churn and it would be pretty much constantly glowing. Thanks
 
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Hi, sin4tra! Welcome to Physics Forums.

Yes, it was triboluminescence. Here's the Wikipedia page with a general description you can start with:
“A historically important instance of triboluminescence occurred in Paris in 1675. Astronomer Jean-Felix Picard observed that his barometer was glowing in the dark as he carried it. His barometer consisted of a glass tube that was partially filled with mercury. Whenever the mercury slid down the glass tube, the empty space above the mercury would glow. While investigating this phenomenon, researchers discovered that static electricity could cause low-pressure air to glow.”
http://en.wikipedia.org/wiki/Triboluminescence

See this Wiki page for a good specific description:
“Barometric light is a name for the light that is emitted by a mercury-filled barometer tube when the tube is shaken.”
http://en.wikipedia.org/wiki/Barometric_light

For an exact scientific explanation, see this:
Letters to Nature, Vol. 391: 15 January 1998
“Picosecond discharges and stick-slip friction at a moving meniscus of mercury on glass
http://www.physics.ucla.edu/Sonoluminescence/fricelec.pdf
 
Thank you for the excellent answer!
 
So I know that electrons are fundamental, there's no 'material' that makes them up, it's like talking about a colour itself rather than a car or a flower. Now protons and neutrons and quarks and whatever other stuff is there fundamentally, I want someone to kind of teach me these, I have a lot of questions that books might not give the answer in the way I understand. Thanks
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