For `3s` orbital of hydrogen atom, the normalised wave function is
`Psi_(3s)=(1)/((81)sqrt(3pi))((1)/(a_(o)))^(3//2)[27-(18r)/(a_(o))+(2r^(2))/(a_(o)^(2))]e^((-r)/(3a_(o)))`
If distance between the radial nodes is d, calculate the value of `(d)/(1.73a_(o))`