UCL PHYSICS AND ASTRONOMY
P HAS 0023 HW 6
P HAS0023 ATO MIC AND MOLEC ULAR PHYSICS
Self-assessment questions (2021-22)
Week 6 (21.2.2022 - 27.2.2022)
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1. Under what conditions can the Born-Oppenheimer approximation be employed in
s olving the time-independent Schrödinger equation for a molecule?
2. Give a general expres s ion for the form of the total wavefunction of a diatomic
molecule under the Born-Oppenheimer approximation.
3. What is the importance of variational principle for solving quantum mechanical
problems ?
4. The one-dimensional harmonic oscillator is moving in the potential
V(x)= mv
2
x
2
/2, where mis the mass of the particle and ω the oscillator frequency.
Us ing a trial wavefunction of the form: