Who invented the glow stick?
In the early 1960s Edwin A. Chandross invented the glow stick.
What happens if you take 2 styrofoam cups and fill one with cold water and one with hot water and drop a glow stick in each?
The better question is does a glow stick glow longer in hot or cold environments. Here since its a chemical reaction heat acts as a catalyst and speeds up the process. So in warm weather you'll get brighter glow that lasts significantly shorter then a glow stick in a cold environment. Funny enough if you cool down a glow stick enough (about -60 F) then the process will stop altogether.
You can bring a dead glow stick back to life. Put the dead glow stick in the freezer, leave in there for at least 3 hours, then take the glow stick out and 1) put it in the microwave for 10-15 seconds no more than 25 seconds (may be dangerous) or 2) put them in a glass of hot/warm water until they start glowing again (safe). . You can repeat this process over and over…
No, a glow stick cannot be reused. When the stick is broken, the chemicals, which have been held separate, are released. They will mix and begin the reaction that releases the light. The reaction will continue until the chemicals are "used up" and the stick stops glowing. The light stick cannot then be reused.