The next three questions pertain to the situation described below. An electron in a quantum well of width 2 nm (treat as

[answerhappygod]

The Next Three Questions Pertain To The Situation Described Below An Electron In A Quantum Well Of Width 2 Nm Treat As 1 (50.29 KiB) Viewed 18 times

The next three questions pertain to the situation described below. An electron in a quantum well of width 2 nm (treat as an infinite square well) is initially (at t= 0) prepared in a superposition of the 1st and 2nd excited states: Y = AY 'first excited + B Y second excited where A, B+0. 18) How long must we wait until the electron has the same probability distribution as at t=0? S a. 6.8 x 10-15 b. 8.8 x 10-15 c. The probability density will never return to its initial distribution 19) Assuming Yfirst excited and Ysecond excited are individually normalized wavefunctions, which of the following are allowable value for A and B? a. A = 0.5, B = 0.5 b. A=0.5, B = -0.5 c. A=0.5 e2i, B=0.5e-2i d. all of the other choices e. none of the other choices 20) The electron is now allowed to decay to its ground state. Which of the following is a correct statement about the photon emitted during this decay process? a. The photon could have energy 0.75 eV or 0.28 eV. b. The energy of the emitted photon depends on the values of the coefficients A and B (but still assuming A, B70). c. The energy of the emitted photon depends on the precise time at which the decay occurs.