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In a photoelectriceffect setup, a point source light of power ((p)/(4piR^(2))) =3.2xx10^(-3)W emitsmonoenergetic photons of enegry5.0 EV.Then photons falling on a metallic sphere of radius r=6 mm and of work function 3.0 eV at distance of 0.6 mm. The efficiency of photo- electron emissionis on for every 10^(5)incident photons.Assume that the sphere is located and initially neuttral and that photoelectron are instantly swept away after emission. [Given hc=1240 eV-nm]Calculate the accumulated charge oan the metallic sphere in one sec. |
| Answer» Solution :Acumulated chager `=1.6xx10^(-19)xx10^(6)=1.6xx10^(-13) C`. | |