Simple Harmonic Motion

A mass '\(\mathrm{m}_1\)' is suspended from a spring of negligible mass. A spring is pulled slightly in downward direction and released, mass performs S.H.M. of period '\(\mathrm{T}_1\)'. If the mass is increased by '\(\mathrm{m}_2\)', the time period becomes '\(\mathrm{T}_2\)'. The ratio \(\frac{\mathrm{m}_2}{\mathrm{~m}_1}\) is