Hermann von Helmholtz

The leading scientist of his time, Hermann Ludwig Ferdinand von Helmholtz measured the speed of a nerve impulse (a task previously thought to be impossible), revived Thomas Young’s theory of color vision, and showed that the ear’s basilar membrane vibrates sympathetically to stimulation. A student of Johannes Muller, Helmholtz also invented the ophthalmoscope (an instrument used to look into the eye and examine the retina).

Check out this video on Psychology and Experimental Physiology.


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