3 0 c m
40cm
actual image size: 32cm x 22cm
Description
Lodge spark gap; Hertz spark gap; and two transmitting discs. Sir Oliver Lodge (1851-1940) was an English physicist who was a pioneer of wireles telegraphy. Heinrich Hertz (1857- 1894) was a German physicist who, in 1887, realised James Clerk-Maxwell's (1831-1879) predictions by his fundamental discovery of electromagnetic waves, which, excepting wavelength, behave like light waves.
Image Details
Image Ref.
10251651
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