Animated video: 37 principles of chemical reactions and their dangers – The universe within a light bulb

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Principle: This is a flash bulb that contains zinc wire and oxygen; it ignites when electricity is applied to it, and can only be used once. It is covered with a layer of plastic film just in case the bulb breaks. Before the advent of modern electronic flashlights, it was the main lighting device; it took longer to reach full brightness, but its burning time was also longer. When this image was shared online, many people said it showed the moment a light bulb burned out; unfortunately, a regular tungsten filament bulb simply fades away gradually as it reaches the end of its lifespan. Fun fact: Early flash bulbs used magnesium wire, which was less bright than zinc. Earlier, magnesium powder and potassium chlorate were mixed and ignited in an open environment. This is the origin of the term “flashlight”. Furthermore, many netizens said, “This is our universe.” Recorder: 2FC filmpruduction. Risk: Low. The bulb will be very hot after use, and it should not be touched with bare hands immediately.