Monochromatic light of frequency \(f_1\) shines on a metal surface inside an evacuated tube, ejecting photoelectrons that require a stopping potential of \(V_1\) to reduce the photocurrent to zero. The light source is replaced with one of frequency \(f_2 = 1.5 f_1\) while maintaining the same light intensity. Which of the following claims correctly compares the new stopping potential \(V_2\) to \(V_1\), and provides the correct physical justification?