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when you ‘break’ it your snapping a ‘barrier’ on the inside that seperates 2 liquids. its just a simple chemical reaction
“A glow stick is a single-use translucent plastic tube containing isolated substances which when combined are capable of producing light through a chemical reaction-induced chemoluminescence which does not require an electrical power source.”
There is a tube of one chemical inside another. When you bend the tube the one inside breaks and mixes with the other.
Two chemicals are separated by a glass membrane. When you break the membrane, they combine and have what’s called a photochemical reaction. Simply put, two types of molecules are exchanging electrons from some of their atoms, and some of them are released in the form of photons, creating light. When the chemical reaction rns out of ‘fuel’, the glowstick fades.
Thermal energy happens which separates the two liquids and makes them glow.
Heres a link.
Simple chemical reaction beetween two liquids.
We were just going over this in our chemistry class this past semester and one of the assignments was to find out how glow sticks work. Bascially a chemical reaction called chemiluminescence that emits light. Once the reaction is finished, the sticks stop glowing… We found some useful info at the following sites: