There are altogether eleven bands clearly noticeable in the spectrum, which are marked with arrows. Measurements of the wave-lengths of these Raman bands have shown that water has an absorption ...

The spectrum reflects the behavior of the molecule quinine sulfate which provides the bitter taste in tonic water. For this measurement we used a UV LED (400 nm) to excite the quinine. Also shown ...

This causes an absorption spectra, as shown below. Because the energy levels are the same, the lines in the emission spectra of an element are in the same position as the lines in the absorption ...