Problem 1.14 Let Pab () be the probability of finding a particle in the range (a <.x b at time t. show that d pab="J(a." j dt where in ax what are the units of t comment: is called probability current because it tells you rate which past point x. if increasing then more flowing into region one end than flows out other. any i real or has spatially constant phase i.e. v eid f for functions does this imply energy eigenstates calculate a gaussian wavepacket>