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+// Scilab Code Ex3.11: Page-109 (2013)

+clc; clear

+phi = 2.93;    // Work function of lithium, eV

+lambda = 400e-009;    // Wavelength of incident light, m

+e = 1.6e-019;    // Energy equivalent of 1 eV, J

+c = 2.998e+008;    // Speed of light in vacuum, m/s

+h = 6.626e-034;    // Planck's constant, Js

+E = h*c/(lambda*e);    // Energy of incident light, eV

+V0 = E - phi;    // Stopping potential, V

+printf("\nThe energy of incident photons = %4.2f eV", E);

+printf("\nThe stopping potential = %4.2f V", V0);

+

+// Result

+// The energy of incident photons = 3.10 eV

+// The stopping potential = 0.17 V 
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