Bohr radius of nth orbit of an atom is given by the expression
r = `(n^2h^2)/(4pi^2mZe^2)`
r = `(n^2h^2)/(4pi^2mZ)`
r = `(n^2h^2)/(4pi^2me^2)`
r = `(nh)/(4pi^2me^2)`
give me solution off this