Abstract
PREVIOUS work on this phenomenon1,2,3 showed that a current decrease Δ i is produced by irradiation of chlorine and other gases referred to the rectified mean r.m.s. values of i under different conditions; changes in the corresponding current-structure and its time-delineation are revealed by a cathode ray oscillograph3. An iron core step-down transformer was introduced in series with an A.C. indicator. Its secondaries Were connected to one pair of the deflecting plates in the oscillograph; the other pair was connected to the time-sweep potential. With but a moderate amplifier gain on each of the plate pairs and the usual adjustments, the oscillograph revealed, besides the frequency of the A.C. supply, a remarkably large number of higher frequencies of widely varying strengths; they were not transients but repeatable and characteristic constituents of i the discharge current. It was also striking to observe the sensibly instantaneous and reversible diminution of the amplitudes of these component frequencies, on irradiating the discharge tube, as shown by a typical pair of oscillograms reproduced herewith.
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References
Joshi, Curr. Sci., 8, 548 (1939).
Joshi, Pres. Address, Chem. Sec, Ind. Sci. Cong. (1943).
Joshi, Benares Hindu Univ. J., 8, 99 (1943).
Joshi, Trans. Farad. Soc., 25, 120 (1929).
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JOSHI, S. Light-Effect in Chlorine under Electrical Discharge: Change of the Wave Form due to Irradiation. Nature 154, 147 (1944). https://doi.org/10.1038/154147a0
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DOI: https://doi.org/10.1038/154147a0
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