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//Calculate the Wavelength in nanometer for transition in Hydrogen atom
//Example 14.3
clc;
clear;
nf=2; //Quantum number for emmision process (n=4 to 2)
ni=4; //Quantum number for emmision process (n=4 to 20)
RH=109737; //Rydberg constant in cm^-1
new=RH*abs((1/ni^2)-(1/nf^2)); //Frequency in cm^-1
Lemda1=1/new; //Wavelength in cm
Lemda=Lemda1*10^7 //Wavelength in nm
printf("Wavelength = %.0f nm",Lemda);
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