
The Invention of Photography
In Our Time
00:00
Photochemical Capturing - A History of Chemistry
Photographic plates are far more sensitive at the blue and violet end than they are at the red end. That meant that there was always the possibility of capturing on a photographic plate marks of things we cannot see. Talbot had already anticipated that back in 1844. With long exposures, photographic plates could pick up images too faint for us to see.
Transcript
Play full episode