Region 1 Region 2 Region 3 V _________ o x=0 L 45. A matter wave of energy E > 0 and wave number k is incident from the left on a potential well of width L and depth V0. Thetop of the well is at zero energy and the bottom of the well is at 'Vo- as shown in the gure above. The spatial pan of the wave function in region 3 has which of the following fonns? (A is a constant.) (A) Ava\" (B) Asinkx (C) Acoskr (D) Ae" (k'