Elizabeth Hertz, wife of Heinrich Hertz, and their eldest daughter Johanne, 1889.

 
Elizabeth Hertz, wife of Heinrich Hertz, and their eldest daughter Johanne, 1889.
4 0 c m
 
28cm
actual image size: 20cm x 32cm

Description

Photograph. Hertz (1857-1894) discovered 'Hertzian waves' (electromagnetic waves) and discovered that they behaved like light waves except for their wavelength. He was reputedly the first person to transmit and receive radio waves and the unit of frequency of radio waves is named after him.

© Science Museum / Science & Society Picture Library

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