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// Scilab Code Ex2.4 Longest wavelength of incident radiation: Pg:45 (2008)
h = 6.624e-034; // Planck's constant, Js
c = 3e+08; // Speed of light, m/s
e = 1.6e-019; // Energy equivalent of 1 eV, joule/eV
phi = 6*e; // Work function of metal, joule
f0 = phi/h; // Threshold frequency for metal surface, Hz
L0 = c/f0; // Threshold (Longest) wavelength for metal, m
printf("\nThe longest wavelength of incident radiation = %4d angstrom", L0/1e-010);
// Result
// The longest wavelength of incident radiation = 2070 angstrom
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