Two singly ionized isotopes with positive charge \(q\) and masses \(m_1\) and \(m_2\) (where \(m_2 > m_1\)) enter a region of uniform magnetic field \(B\) directed perpendicular to their velocities. Both ions enter through the same slit with the same kinetic energy \(K\) and travel in semicircular paths before striking a detector plate aligned with the entrance slit. Which of the following expressions represents the separation distance \(\Delta x\) between the two impact points on the detector plate?