Hippolite Fizeau

Hippolite Fizeau

C025/4383 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 50.0MB

Downloadable file size: 4.8MB

Price image Pricing

Please login to use the price calculator


Credit: SHEILA TERRY/SCIENCE PHOTO LIBRARY

Caption: Armand Hippolyte Fizeau (1819-1896), French physicist. Fizeau is best known for determining the speed of light in collaboration with Leon Foucault. He also measured the speeds of light in moving water and predicted the redshifting of electromagnetic waves. His earliest work was concerned with improvements in the newly introduced photographic imaging processes. One of the disadvantages of the Daguerreotype was the extreme fragility of the silver-mercury amalgam image. In 1840 Fizeau published a process of toning the image by treating the daguerrotype image with a solution of gold chloride and the fixing agent sodium hyposulphite. This increased contrast and protected the image from abrasion and also prevented oxidation of the silvered plate.

Release details: Model release not required. Property release not required.

Keywords: abrasion, armand hippolyte fizeau, daguerre, daguerreotype, french, gold chloride, herschel, hypo, oxidation, photographic imaging processes, physicist, redshift, scientist, silver, silver-mercury amalgam, sodium hyposulphite, speed of light, toning

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.