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// Ex3_6 Page:51 (2014)
clc; clear;
M = 1; // For simplicity assume mass of a proton to be unity, amu
m_e = 1/1836; // Mass of an electron, amu
m_d = 2*M; // Mass of a deuterium, amu
lambda = 6562.8; // Wavelength of H_alpha line of hydrogen, angstrom
mu = M/(1 + M/m_e); // Reduced mass of an electron-proton system, amu
mu_prime = m_d/(1 + m_d/m_e); // Reduced mass of an electron-deuterium system, amu
lambda_prime = lambda*mu/mu_prime; // Wavelength of H_alpha line of deuterium, angstrom
printf("\nThe wavelength of H_alpha line of deuterium = %4d angstrom", lambda_prime);
// Result
// The wavelength of H_alpha line of deuterium = 6561 angstrom
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