. The study of the velocity of electrons in the photo-electric effect, as a function of the wave-lengths of the light. the cell continuously, and make observations untilsuch a steady state was reached. It is probable, moreover that thesurface of the metal undergoes slight changes so that the sensitive-ness either increases or decreases in the oourse of time. Potassium was placed in bulb If, , distilled into TC androured through funel F into final position C in cell TIo. 4. Thesurface of the potassium became darkened to a redish purple color,as the cell wa3 left exposed to the light of
. The study of the velocity of electrons in the photo-electric effect, as a function of the wave-lengths of the light. the cell continuously, and make observations untilsuch a steady state was reached. It is probable, moreover that thesurface of the metal undergoes slight changes so that the sensitive-ness either increases or decreases in the oourse of time. Potassium was placed in bulb If, , distilled into TC androured through funel F into final position C in cell TIo. 4. Thesurface of the potassium became darkened to a redish purple color,as the cell wa3 left exposed to the light of the room for six daysbefore the observations, as shown in Table III and curves of PlatesIV and V, were taken cob TABLE No. in • Caesium Cell r:o. 4. t = 33°C. e-length. Fre i-^ncy0, Def. mm. Volte fx M t n3C 1 u u V ri p • RAR i p 7 fl A^P AA A 7PP r UU p £° P ao r OOCJ P, 7 7P f^T p TA£ Aon P A PQ OtU ?7PQ • OUf3 Al 9 97C O f a P A 7 ? £pp P A p 997, <so r P 7TCU, 660 .207 264 690 .183 220 720 .173 120 750 .160 192 Volte on needle of electrometer 127. K = .00150.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectlight, bookyear1912
