Question

William Henry Talbot’s photographic system involved placing the negative against a _____ treated surface that was then exposed to _____. chemically / sunlight heat /chemicals motion / heat

Answer 1

The answer is: “William Henry Talbot’s photographic system involved placing the negative against a chemically treated surface that was then exposed to sunlight heat.
He devised several ways of chemically stabilizing the results to make them sufficiently insensitive to exposure that the sunlight could be used to print the negative.

Answer 2

Answer : William Henry Talbot’s photographic system involved placing the negative against a chemically treated surface that was then exposed to sunlight heart.

Explanation : William Henry Talbot was the scientist who devised several ways of chemically stabilizing the results of negatives, by making them sufficiently insensitive to exposure from direct sunlight and could be used to print the negative image produced in the camera onto another sheet of salted paper, creating a positive.