How does a glow stick work?

I think there is some sort of chemical that is set off when the stick is bend to a certain extent which ignites some sort of glow/light.

I think there is some sort of chemical that is set off when the stick is bend to a certain extent which breaks a very thin glass cylinder which holds a chemical and that mixes with the other chemical to make it glow.

I think my second answer was bang on and that there was a glass cylinder that broke and set off a glow.

Glow sticks are used by campers, divers and many other people to create light. To activate a glow stick you just bend the plastic tube filled with a chemical and that will break the glass cylinder holding another chemical causing light which makes the stick glow.


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