Heinrich Hertz
print. etching. Heinrich Hertz 1857-1894. / F. Tonnelat. - n.d. [1955-1964] [Men in telecommunications] International Telecommunication Union 23x19cm. -Portrait. HS. Heinrich Rudolf Hertz, German physicist, demonstrated experimentally the production and detection of Maxwell's waves, leading to radio, television, and radar; discovered the photoelectric effect, 1887.