P2: An electron in an in nite well of width a = 8 A transits from energy level n = 3 to n = 2 and emits a photon. Determine what is the wavelength of the photon?
P3: An electron in an in nite well of width a = 4 A is in the ground state (n = 1). What is the probability to nod the electron within 1 A from the center of the well?