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Johann Heinrich Schulze | German physician | Britannica
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- Johann Heinrich Schulze German physician and anatomy professor who made a significant discovery in the development of photography when he observed that silver salts darkened when exposed to sunlight.
Johann Heinrich Schulze – Wikipedia
- Johann Heinrich Schulze (– 10 October ) was a German professor and polymath.
Johann Heinrich Schulze – Wikipédia, a enciclopédia livre
- the German professor of anatomy Johann Heinrich Schulze proved that the darkening of silver salts, a phenomenon known since the 16th century and possibly earlier, was caused by light and not heat.
Johann Heinrich Pestalozzi (1746-1827): biografía literaria y ...
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Johann Heinrich Schulze
German professor and polymath
Johann Heinrich Schulze (12 May – 10 October ) was a German professor and polymath.
History
Schulze studied medicine, chemistry, philosophy and theology and became a professor in Altdorf and Halle for anatomy and several other subjects.
Notable discoveries
Schulze is best known for his discovery that the darkening in sunlight of various substances mixed with silver nitrate is due to the light, not the heat as other experimenters believed, and for using the phenomenon to temporarily capture shadows.[1]
Schulze's experiments with silver nitrate were undertaken in about [2] He found that a slurry of chalk and nitric acid into which some silver had been dissolved was darkened by sunlight, but not by exposure to the heat from a fire. To provide an interesting demonstration of its darkening by light, he applied stencils of words to a bottle filled with the mixture and put it in direct sunlight, whic
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Biografia de Johann Heinrich Pestalozzi - Biografias y Vidas .com
- Johann Heinrich Schulze (12 de mayo de de octubre de ) fue un científico y profesor alemán nacido en Colbitz cuya contribución a la química fotográfica fue descubrir que las sales de plata se oscurecen por la acción de la luz del sol.