Letter | Published:

The Artificial Spectrum Top

Naturevolume 51page292 (1895) | Download Citation

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Abstract

As the spectrum top is exciting a good deal of interest at the present moment, perhaps I may be allowed to record some experiments which I have made with a view of arriving at a solution of the colour problem which it sets. I have observed the colours produced by the white light of the positive pole of the electric arc, and also by monochromatic light produced by means of my colour-patch apparatus. The top was rotated on a horizontal axis at any desired speed by means of an electromotor. The following colours were observed (No. 1, No. 2, No. 3, and No. 4 are the triple lines in order from the centre of rotation):

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  1. Search for W. DE W. ABNEY in:

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https://doi.org/10.1038/051292b0

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