Good afternoon I need help with a question in my physical chemistry class. A particle having mass m is described as having the (unnormalized) wavefunction ψ=k, where k is some constant, when confined to an interval in one dimension; that interval having length a (that is, from x=0 to a). What is the probability that the particle will exist in the first third of the interval, that is from x=0 to (1/3)a? I know that the wavefunction needs to be normalized first. ψ=Nψ ∫Nψ* x Nψdx ∫N*k (Nk)dx limit 1/3a to 0∫N*N (k^2)dx This is where I keep getting stuck because I don't know where to go from here since the wavefunction is only a constant. If someone could guide me I would greatly appreciate it. Thank You in advance.