Two photos with a piece of glass is used. If it is the same, I think the possibility of large Raman. If it is two pieces of glass, the glass color will look at exchange, exchange and exchange. With the glass color with the glass, the fluorescence may be greater color with laser pen light, then Raman is more likely.
Glass glass, laser pen light scattering blue light incident incident yellow, red, or the possibility to estimate the Raman scattering of some. Of course it is also possible to fluorescence phenomenon is complex, if the glass glass impurities in the complex.
There are many kinds of incident light (laser pen light) incident, can be excited to a higher energy level, and the high level drop to a lower level, it is only several fixed. Moreover, the vibrational relaxation time may be longer, so the molecules are excited not immediately light.
Laser pen light and fluorescence phenomenon, are can be used to detect the compositions of different substances have different characteristic fluorescence spectra and Raman spectra. The spectral line is determined by the energy structure in the material. People can use fluorescence or Raman, determine the composition of the mixture and specific cases.