Discuss the basic types of molecular spectroscopy $($ Rotational "Microwave" spectroscopy $)$

$-$ Your report should include the following

$1-$Theoretical background in terms of models and principles involved $($e$.$g$.,$ the rigid rotor harmonic oscillator, and Franck$-$Condon principle$),$ the separation of energy levels and the selection rules.

$2-$The conditions for each types of spectroscopy and the types of molecules involved with examples.

$3-$The information inferred from each types of molecular spectroscopy and structure elucidation and spectra interpretation with examples.

$4-$Brief illustrations for spectrophotometers for each types of spectroscopy.

$5-$Types of electronic excitations $($e$.$g$.,n{}^{**}$ and ${}^{**}),$ fluorescence and phosphorescence.

$6-$General info like spectral range and units.

$(($ Think physical much more than analytic or organic!!

References must be books or journals articles. Physical chemistry books should be enough.$))$