. The Bell System technical journal . WOLTS ON CATHODE VOLTS ON CATHODE Fig. 5—Voltage-current curves for typical central anode vacuum 100 i +V0LT5 ON CATHODE - V0LT5 ON CATHODE Fig. 6^Voltage-current curves for t^-pical central anode gas filled cell. from the voltage axis in the manner shown in Figure 6. As in the caseof the central cathode cells, the current increases with voltage untilthe critical potential for the gas is reached. The illumination-current relationship is rectilinear in the centralanode cells, as it was in the central cathode cells, provided the pre-cautions as to avo
. The Bell System technical journal . WOLTS ON CATHODE VOLTS ON CATHODE Fig. 5—Voltage-current curves for typical central anode vacuum 100 i +V0LT5 ON CATHODE - V0LT5 ON CATHODE Fig. 6^Voltage-current curves for t^-pical central anode gas filled cell. from the voltage axis in the manner shown in Figure 6. As in the caseof the central cathode cells, the current increases with voltage untilthe critical potential for the gas is reached. The illumination-current relationship is rectilinear in the centralanode cells, as it was in the central cathode cells, provided the pre-cautions as to avoiding free glass surfaces, already mentioned, areobserved. 326 BELL SYSTEM TECHNICAL JOURNAL Infulence of the Nature of the Irradiation The niagnitiidc of the photoelectric current depends upon the angleof incidence, the plane of polarization and the color or wave lengthof the light used. This dependence is closely interlinked with thechoice of the photo-sensitive material and the state of its the purpose of separating out the effects of the several variablesin the incident light, it is necessary to study the properties of
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