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// Scilab Code Ex2.23 Wavelength of emitted light: Pg:60 (2008)
e = 1.6e-019; // Charge on an electron, coulomb
h = 6.624e-034; // Planck's Constant, Js
n = 2; // Principal quantum number for second orbit in H-atom
V = 13.6; // Ionization potential of H-atom, V
U1 = -1*V*e; // Energy of electron in first orbit, J
U2 = U1/n^2; // Energy of electron in second orbit, J
// As U2 - U1 = h*c/L, solving for L
L = h*c/(U2 - U1); // Wavelength of light emitted in the transition from second orbit to the first orbit, m
printf("\nThe wavelength of light emitted in the transition from second orbit to the first orbit = %4d angstrom", L/1e-010);
// Result
// The wavelength of light emitted in the transition from second orbit to the first orbit = 1217 angstrom
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