Atoms And Nuclei

A small particle of mass \(m\) moves in such a way that its potential energy \(U=\frac{1}{2} m ~\omega^{2} r^{2}\) where \(\omega\) is constant and \(r\) is the distance of the particle from origin. Assuming Bohr's quantization of momentum and circular orbit, the radius of \(n^{\text {th }}\) orbit will be proportional to,