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//variable initialization
v1=8.657*10^13; //frequency of rotation absorption spectrum (Hz)
v2=8.483*10^13; //frequency of rotation absorption spectrum (Hz)
h=6.6*10^-34; //Plank's constant (joule second)
mu=1.544*10^-27; //Recuced mass of CH molecule (kg)
//(i) equilibrium separation
I=h/(2*%pi^2*(v1-v2)); //Moment of inertia (kg m^2)
r=sqrt(I/mu); //equilibrium internuclear distance (m)
//(ii) force constant of molecule
v0=(v1+v2)/2; //Central frequency (Hz)
k=4*mu*(%pi*v0)^2; //Force constant of CH molecule (N/m)
printf("\n (i) equilibrium separation = %.2e meter\n (ii) force constant = %.0f N/m",r,k);
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