thumb|1909 flash-lamp 1903 view camera thumb|Crop of patent number 636,492
thumb|1909 flash-lamp 1903 view camera thumb|Crop of patent number 636,492
The electric flash-lamp uses electric current to start flash powder burning, to provide a brief sudden burst of bright light. It was principally used for flash photography in the early 20th century but had other uses as well. Previously, photographers' flash powder, introduced in 1887 by Adolf Miethe and Johannes Gaedicke, had to be ignited manually, exposing the user to greater risk.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).