Scattering Summary ∂α/∂q

Polarisability

Scattering Theory Quantum Picture

Raman

●---● Rotational Raman Spectroscopy

-iħ ∂/∂q Schrödinger Recipe

H = ½ω(p 2 + q 2 ) The Harmonic Oscillator QM

αα βαββ αβ Spin

Double monochromater

Example [p,q] = iħ So p the momentum and q the coordinate of a quantum system may not be measured precisely simultanoesly From this we deduce Heisenberg’s Uncertainty Principle ∆p∆q ~ ħ and ∆E∆t ~ ħ Which indicates that we can measure the energy of a molecule but when it had that energy