List of top Physics Questions on Quantum Mechanics asked in CPET

The recoil momentum of an atom is \(p_A\) when it emits an infrared photon of wavelength 1500 nm, and \(p_B\) when it emits a photon of visible wavelength 500 nm. The ratio \(p_A/p_B\) is:

The wave function of a particle in a region classically forbidden region is __________.

The probability current density (probability density current) in one dimension is given by:

The expectation value of \(p_x\) of the momentum of a particle trapped in a one-dimensional box is:

The quantum operator for energy is:

Which one of the following is correct with respect to an electron and a proton having the same de-Broglie wavelength of \(0.2\ \text{\AA}\)?