For a particle with mass m in a 1-D box of length a, show that the first excited state wavefunction is orthogonal to the wavefunction is orthogonal to the second excited state wavefunction.

a) For a particle described by the wavefunction in Equation (1), show that the expectation values for momentum and momentum-squared are given by shown in image b) For the same particle, show that the expectation values for position and position-squared are given by shown in image

The figures below show the wave function describing two different states of a particle in an infinite square well. The number of nodes (within the well, but excluding the walls) in each wave function is related to the quantum number associated with the state it represents: Wave function A number of nodes = n-1 Wave function B M Determine the wavelength of the light absorbed by the particle in being excited from the state described by the wave function labelled A to the state described by the wave function labelled B. The distance between the two walls is 1.00 × 10-10 m and the mass of the particle is 1.82 × 10-30 kg. Enter the value of the wavelength in the empty box below. Your answer should be specified to an appropriate number of significant figures. wavelength = nm.

A particle with the velocity v and the probability current density J is incident from the left on a potential step of height Uo, that is, U (x) = Uo at r > 0 and U(x) = 0 at r 0.