A beam of light traveling inside a glass block of index of refraction \(n = 1.50\) approaches a boundary with air of index of refraction \(n = 1.00\). The critical angle for total internal reflection at this boundary is \(\theta_c = 42^\circ\). As shown in the diagram, three light rays (Ray 1, Ray 2, and Ray 3) strike the boundary at incident angles relative to the normal of \(30^\circ\), \(42^\circ\), and \(55^\circ\), respectively. Which ray undergoes total internal reflection, and why?