Abstract
THE beautiful effects produced by the rotation of a vacuum-tube when illuminated by a series of electrical discharges from an induction-coil are well known. The tube is generally attached to a horizontal axis, which is turned rapidly by means of a multiplying wheel; the images due to successive discharges which, if the tube were at rest, would be superposed, are thus caused to occupy different parts of the retina, and if the discharges follow one another at the rate of n per second, the num berj of images simultaneously visible will be about n/8' since the luminous image produced by each separate flash persists for about an eighth of a second after the flash itself has ceased. The result of these effects is the appearance of a gorgeous revolving star.
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BIDWELL, S. On Certain Spectral Images Produced by a Rotating Vacuum-Tube . Nature 32, 30–31 (1885). https://doi.org/10.1038/032030e0
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DOI: https://doi.org/10.1038/032030e0
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