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The phenomenon of "overlapping resonances interference-induced transparency"(ORIT) is introduced and studied in detail for the $S_0 \to S_2/S_1$photoexcitation of cold pyrazine (C$_4$H$_4$N$_2$). In ORIT a molecule becomestransparent at specific wavelengths due to interferences between envelopes ofspectral lines displaying overlapping resonances. An example is the$S_2\leftrightarrow S_1$ internal conversion in pyrazine where destructiveinterference between overlapping resonances causes the $S_0 \to S_2/S_1$ lightabsorption to disappear at certain wavelengths. ORIT may be of practicalimportance in multi-component mixtures where it would allow for the selectiveexcitation of some molecules in preference to others. Interference inducedcross section enhancement is also shown.

Overlapping Resonances Interference-induced Transparency: The $S_0 \to S_2/S_1$ Photoexcitation Spectrum of Pyrazine