Ciências

Autor: Published on LIFE

Título: Electrical engineer/inventor Guglielmo Marconi with the spark-gap transmitter (right) and coherer receiver (left) he used in some of his first long distance radiotelegraphy transmissions during the 1890s.

Data: 1901

Origem: This image comes from the Google-hosted LIFE Photo Archive where it is available under the filename 4a204d82f07524bd.

Fonte: https://pt.m.wikipedia.org/wiki/Ficheiro:Guglielmo_Marconi_1901_wireless_signal.jpg

Licença: Domínio Público