. The study of the velocity of electrons in the photo-electric effect, as a function of the wave-lengths of the light. ft? ?VT •< f J MTV. OPEULIXOX8 3ft ^T a^/^ ? Committee ^as^r a I Final Examination. 2 imm utuc 1 Historical Introduction. The modern field of photoelectric research was first opened byHertz1 in 1887 by his discovery that the passage of a spark betweentwo metal electrodes was facilitated by the incidence of ultra-vio-let light upon the spark-gap. This interesting discovery lead toresearch in various directions. Hertz found that the discharge,across the gap was occasioned onl
. The study of the velocity of electrons in the photo-electric effect, as a function of the wave-lengths of the light. ft? ?VT •< f J MTV. OPEULIXOX8 3ft ^T a^/^ ? Committee ^as^r a I Final Examination. 2 imm utuc 1 Historical Introduction. The modern field of photoelectric research was first opened byHertz1 in 1887 by his discovery that the passage of a spark betweentwo metal electrodes was facilitated by the incidence of ultra-vio-let light upon the spark-gap. This interesting discovery lead toresearch in various directions. Hertz found that the discharge,across the gap was occasioned only by the action of the light uponthe negative electrode. It was discovered by Hallwaohs^ in 1888,that certain substances, when negatively charged, lost their chargeswhen ultra-violet light was incident upon them; and if they were in-itially uncharged they accumulated a positive charge when the other han , if these substances are originally positivelycharged, they do not lose their charge when exposed to ultra-violetlight. Hoor**, Righi4, Elster and Oeitel^ and others extended ourknowledge in this field. The last named authors have shown that themore electro-positive metal3 lose negatstudyofvelocityo00corn
Size: 3113px × 803px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectlight, bookyear1912
