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Light from molecules creates a spectrum (a ‘spectre’ or ‘ghost’) that can be recorded with sensitive detectors in our laboratory. The word ‘spectrum’ is derived from a time when light dispersed through a prism was called a ‘spectre’ or ‘ghost’. This movie visualises spectra or light energy patterns associated with molecules. Each dot in the patterns is a quantised energy change. Quantum calculations show how the patterns can initially match experimental data and then ‘dance’ through a myriad of energy possibilities.
