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// Scilab Code Ex2.2 Maximum velocity of photoelectrons: Pg:44 (2008)
phi = 4*1.6e-019; // Work function for photoelectric surface, joule
h = 6.6e-034; // Planck's constant, Js
e = 1.6e-019; // Electronic charge, coulomb
m = 9.1e-031; // Mass of the electron, kg
f = 1e+15; // Frequency of incident photons, Hz
c = 3e+08; // Speed of light, m/s
// KE = 1/2*m*v^2 = h*f - phi, solving for v, we have
v = sqrt(2*(h*f - phi)/m); // Maximum velocity of photoelectrons, m/s
printf("\nThe maximum velocity of photoelectrons = %5.3e m/s", v);
// Result
// The maximum velocity of photoelectrons = 2.097e+005 m/s
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