Physics
Scientific paper
Mar 1926
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1926natur.117..418s&link_type=abstract
Nature, Volume 117, Issue 2942, pp. 418 (1926).
Physics
3
Scientific paper
EXPERIMENTS are in progress in which the mercury spectrum is excited by a directed stream of electrons from an oxide coated filament, and the polarisation of the lines examined. The track of the electron beam in a field-free space at a pressure of 1/1000th mm. is well defined, and little visible light is emitted from points not in the path of the electrons. Accelerating voltages of 30-40 volts have mainly been used, and the light from the stream is observed at right angles to its direction. Under these conditions a number of p-d combinations are polarised, the plane of polarisation being with the maximum electric vector parallel to the stream. The plane of polarisation rotates with the tube and so cannot be governed by any stray field.
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