Hermann van Helmholtz
Hermann van Helmholtz
German physicist. Born on 31 August 1821; died on 8 September 1894. Noted for his important discoveries in optics and acoustics. Invented the ophthalmoscope.
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German physicist. Born on 31 August 1821; died on 8 September 1894. Noted for his important discoveries in optics and acoustics. Invented the ophthalmoscope.