出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2010/09/05 21:26 UTC 版)
The electric flash-lamp is a device that uses an electrical circuit to trigger a fuse to ignite explosive powder (e.g., magnesium) for a brief sudden burst of bright light ("flash") from a chemical reaction of flash powder burning. It was principally used for flash photography in the early 20th century, but had other uses as well.