A spring whose unstretched length is I has a force constant k . The spring is cut into two pieces of unstretched lengths $\mathrm{l}_1$ and $\mathrm{l}_2$ where, $\mathrm{l}_1=\mathrm{nl}_2$ and n is an integer. The ratio $\mathrm{k}_1 / \mathrm{k}_2$ of the corresponding force constants, $\mathrm{k}_1$ and $\mathrm{k}_2$ will be