Figure 3 3.5.2. Normalizing the time-dependent wave function Normalizing the time-dependent wave function is similar to that of its time-independent counter part, with the exception that the derivation of N by (19) causes N to become a time-dependen quantity N(t) in its own right due to the normalization integral being only over space. However when the definition Vporm(r,t) = N(t)U(r,t) of N is substituted into (1) as was done in (19), on is forced to again conclude that N must be constant. This apparent contradiction is resolved by observing three primary facts about the nature of (1). The first is that (1) assumes a normalize: solution from the beginning, while the second is that the act of solving (1) does not automaticalh guarantee normalization. Rather, one must solve (1) and then proceed with normalization. Th third fact is that the time-dependent potential term, together with boundary conditions if transient is the force that causes the wave function to evolve through time. To guarantee that the systen remains normalized at all times, the normalization parameter must evolve likewise through time Intuitively speaking, a change in the wave function implies a change in the correction factor usec to ensure normalization, and this reality is implicit in (1) but must be made explicit in its solution Thus, the evidence falls in favor of a time-dependent N. Performing the same procedure as wit! (19) to derive N produces a time-dependent N, and multiplying this N(t) by W (r,t) yields th normalized time-dependent wave functions (22) for both bounded and unbounded domains.