Abstract
I HAVE attempted to repeat the interesting experiments reported by Ehrenhaft and Banet1 on the effect of ultra–violet radiation on “non–magnetic” and annealed pieces of iron. They stated that, with the simplest apparatus (for example, a cheap compass needle), they showed that poles were induced in various pieces of annealed iron, the poles being mainly north magnetic. The specimens were placed perpendicularly to the geomagnetic field and irradiated for periods varying from minutes to several hours. The poles, they state, were present in many specimens after several days.
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References
Ehrenhaft, F., and Banet, L., NATURE, 147, 279 (1941).
Edie, E. G., and Focken, C. M., Trans. Roy. Soc., N.Z., 71, Part I (1941).
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FOCKEN, C. Magnetization of Matter by Ultra–violet Radiation. Nature 148, 438 (1941). https://doi.org/10.1038/148438a0
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DOI: https://doi.org/10.1038/148438a0
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Magnetization of Matter by Ultra-Violet Radiation
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