Putting the jar over the candle keeps oxygen from outside the jar from getting in. The reaction can only use the oxygen that is already in the jar. So, when that oxygen is used up, the reaction can’t ...

One day there will be no more need for flames ... electronic match that lights up when you swipe it against something (with a flicker LED) and that lights the candle’s LED when brought near ...

[cpldcpu] hooked a photodiode to his oscilloscope, pointed it at a candle flame, and recorded the result. The first interesting observation was the candle slowly changed brightness, whether it was ...