A researcher wishes to determine the permanent dipole moment of small polar molecules…
CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A researcher wishes to determine the permanent dipole moment of small polar molecules by monitoring transitions between adjacent rotational energy levels. Which radiation source should the spectrometer employ?
(a) An ultraviolet lamp centered at 250nm
(b) A continuous-wave infrared laser at 1064nm
(c) A tunable microwave cavity emitting radiation of about 3cm wavelength
(d) A γ-ray source producing photons with E>1MeV