Discuss the three basic types of molecular spectroscopy

$-$ Rotational $($microwave$)$ spectroscopy

$-$ Vibrational $($infrared$)$ spectroscopy

$-$ Electronic spectroscopy $($Ultraviolet$-$Visible$)$

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

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

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

$$ General info like spectral range and units.

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