Guadalupe H.

asked • 10/08/21

Forensic Science Chemistry

You have examined a small chip of glass found on the clothing of a burglary suspect and compared that chip of glass (the questioned sample) with a single chip of the known broken glass from the burglary scene. Macroscopically, the two samples appear to have the same general visual characteristics. You have determined that the density of the known glass chip is 2.53235 g/cm3 and that the refractive index of the known glass chip is 1.51768. You have determined that the density of the questioned glass chip is 2.53234 g/cm3 and its refractive index is 1.51767. These values were determined by averaging the measurements made in three independent trials for each analysis. You now need to evaluate whether the questioned glass chip sample may have had a common origin with the known glass from the burglary scene.


a. Under what circumstances would you be able to conclude that the questioned and known glass samples did NOT have a common origin based only on these density and refractive index analyses?

b. Under what circumstances would you be able to conclude that the questioned glass may have originated from the known glass from the burglary based only on these density and refractive index analyses?

c. Is it possible to conclude that you have individualized the questioned glass chip to the known glass from the burglary based only on density and refractive index analyses?


Please answer a), b) and c) separately using appropriately titled subheadings.

1 Expert Answer

By:

Robert S. answered • 10/09/21

Tutor
4.9 (105)

Dr Bob Loves Science (especially chemistry and math)

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