Engraving depicting Lord William Thomson Kelvin's galvanometer, showing how the light source at D is reflected off the mirror of the galvanometer on the scale E, E. The angle of the mirror, and so the measurement read off the scale, depends here on the current flowing through the Wheatstone bridge, A,A' ,B, B'.

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Size: 5678px × 3694px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, archival, archive, bridge, century, electric, electricity, engraving, galvanometer, historic, historical, history, kelvin, light, measurement, mirror, reflection, scale, thomson, wheatstone, william