Dumont cathode ray oscilloscope, c 1945.

FRANCE - JUNE 01: Dumont cathode ray oscilloscope Type 208, serial number 3905. Seeing the waves made by oscillators was difficult until German scientist Ferdinand Braun (1850-1918) invented a form of cathode ray oscilloscope in 1897. An internal oscillator repeatedly sweeps a beam of electrons across the screen at constant speed. The input voltage moves the beam up and down, drawing a picture of the wave. Modern oscilloscopes often display the picture digitally. (Photo by SSPL/Getty Images)
FRANCE - JUNE 01: Dumont cathode ray oscilloscope Type 208, serial number 3905. Seeing the waves made by oscillators was difficult until German scientist Ferdinand Braun (1850-1918) invented a form of cathode ray oscilloscope in 1897. An internal oscillator repeatedly sweeps a beam of electrons across the screen at constant speed. The input voltage moves the beam up and down, drawing a picture of the wave. Modern oscilloscopes often display the picture digitally. (Photo by SSPL/Getty Images)
Dumont cathode ray oscilloscope, c 1945.
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Credit:
Science & Society Picture Library / Contributor
Editorial #:
90736955
Collection:
SSPL
Date created:
June 01, 2001
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License type:
Rights-managed
Release info:
Not released. More information
Source:
SSPL
Object name:
10251001
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3504 x 3118 px (11.68 x 10.39 in) - 300 dpi - 2 MB