Hippolyte Fizeau was a French physicist who was expected to follow family footsteps as a right of passage. Unfortunately for his family, he went his own path when he witnessed Daguerre debut his prototype for the world. He even had a few comments of the device. Fizeau believed that the subject should not have to sit for 30 minutes awaiting an image if a portrait were to be taken. He wanted the subject to be able to have their photo taken and it be developed within the same span of time that it already takes just to take the photograph. Beginning in 1841, Fizeau developed a new technique for photos to be developed by replacing the solution of silver iodide with silver bromide. Now with this switch portraits were able to be created by the speed of light.