Assertion: acetate's effect | /r/HasProperty | described
Facets:
value: earlier
type: TEMPORAL
Source sentences:
text: While the effects of a single light passing through a pinhole had been described earlier, Ibn al-Haytham gave the first correct analysis of the camera obscura, including the first geometrical and quantitative descriptions of the phenomenon, and was the first to use a screen in a dark room so that an image from one side of a hole in the surface could be projected onto a screen on the other side.