How was the realistic function of photography discovered?

As a "mirror" with memory, photography enables human beings to freeze a temporary and fleeting moment in an eternal form, and transfer the image of this frozen moment in time and space.

On July 3th, 1839, in his speech in the French House of Lords, Guy Lussac strongly praised the "unimaginable accuracy" of every detail photographed by the camera in order to persuade the French government to buy Daguerre's invention. He believes that no detail, "even imperceptible", can escape "the eyes and brushes of this new painter".

The ability of photography to accurately record the images of nature itself has aroused people's surprise and made some painters feel panic.

The great French painter Angle (178 ~ 1867), after seeing the photos taken by the silver plate method, had to admire: photography is really wonderful. I really hope to draw so realistically, but any painter may not be able to do it.

a man named Paul? The painter of PaulDelaroche even said with emotion: From now on, painting is finished!

amid the surprise and admiration, the realistic function of photography began to be recognized by people.

Just as Guy Lussac praised photography, Arago, a farsighted French parliamentarian, predicted the application prospect of this realistic function at the joint meeting of the French Academy of Sciences and the French Academy of Arts. He said: how much benefit archaeology will get from this new technology! It will take 2 years to copy the hieroglyphics carved on the huge stone tablets in Thebes, Memphis and Karnak, and there will be a large number of craftsmen who are good at painting. However, with the use of silver photography, only one person can complete the task of the same scale.

Astronomy can also benefit from this new invention. We can take a map of the moon, and in a few minutes, one person can complete the most time-consuming and arduous project in astronomy.