Hermann von Helmholtz

Ewald Hering’s Oponent Colour-Vision Theory

Ewald Hering’s Oponent Colour-Vision Theory

On August 5, 1834, German physiologist Ewald Hering was born. Hering is best known for his research into color vision, binocular perception and eye movements. Hering challenged the color-vision theory of Hermann von Helmholtz. Visual sensations, according to Hering‘s view, were due to three color receptors responding in an “opponent” fashion in color-pairs (white/black, yellow/blue, and red/green) to take account of the after-images of colors. Ewald Hering was born in Altgersdorf, a…
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Hermann von Helmholtz and his Theory of Vision

Hermann von Helmholtz and his Theory of Vision

On August 31, 1821, German physician and physicist Hermann von Helmholtz was born. In physiology and psychology, he is known for his mathematics of the eye, theories of vision, ideas on the visual perception of space, color vision research, and on the sensation of tone, perception of sound, and empiricism. In physics, he is known for his theories on the conservation of energy, work in electrodynamics, chemical thermodynamics, and on a mechanical foundation…
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Heinrich Gustav Magnus and the Magnus Effect

Heinrich Gustav Magnus and the Magnus Effect

On May 2, 1802, German physicist Heinrich Gustav Magnus was born. He is best known for the Magnus effect (the lift force produced by a rotating cylinder, which for example, gives the curve to a curve ball). In chemical research, he discovered the first of the platino-ammonium compounds compounds. Heinrich Gustav Magnus was born in Berlin and received a very decent education in math and natural science. He enrolled at the University…
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