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// Scilab Code Ex2.19 Wavelength of first line of Balmer series: Pg:58 (2008)s
n1 = 2; // Ground level of Balmer line in H-atom
n2 = 4; // Third level of Balmer line in H-atom
R = 1.097e+07; // Rydberg constant, per metre
L2 = 1/((1/n1^2 - 1/n2^2)*R); // Wavelength of second line of Balmer series, m
n2 = 3; // Second level of Balmer line in H-atom
L1 = 1/((1/n1^2 - 1/n2^2)*R); // Wavelength of first line of Balmer series, m
L_ratio = L1/L2; // Wavelength ratio of first and second line of Balmer series, m
L2 = 4861; // Given wavelength of second line of Balmer series, angstrom
L1 = L2*L_ratio; // Wavelength of first line of Balmer series, angstrom
printf("\nThe wavelength of first line of Balmer series = %4d angstrom", L1);
// Result
// The wavelength of first line of Balmer series = 6562 angstrom
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