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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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