T F If the operators of two properties do not co T F The angular momentum operators in the x,y and z directions (L^x,L^y,L^z ) do not commute with each other, and also do not commute with the square of the total angular momentum I F The second vibrational wavefunction has two nodes. T F The highest probability of finding a particle in a box of length L when n=0 is at the center of T F the box. SF6 is an example of spherical rotor and CO2 is an example of linear rotor. T F The moments of inertia (Ix,Iy,Iz) in the case of linear and diatomic rotors are all equivalent. T F The solution of the Schrdinger equation of the hydrogen atom has two part, one is positive for the bound state and the other is negative for the non-bound state. T F The parity of is a term that is related to inversion through a center of symmetry in the molecular wavefunction. T F Fluorescence, phosphorescence and photochemical reaction are radiative ways of elimination (loss) of excitation energy. T F four-level laser is more effective than three-level laser since the population inversion is more effective. T F Neodymium laser is an example on solid-state four-level laser. T F Population inversion is a basic requirement for laser and it means that the energy of the emitted light is higher than the energy of excitation