When studying trace evidence found at a crime scene, forensic scientists use in their arsenal tools at their disposal besides microscope. Using the following method, which is the most commonly used, forensic scientists can ascertain the chemical characteristics of trace evidence. In order to learn more about best photogrammetry software, check it out here.
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This helps them determine whether the samples tested are the same and thus share a common origin.
Following are the characteristics to determine the trace evidence of crime scene measurement
Infrared (IR) spectrophotometry: This laboratory method requires exposing samples of trace evidence infrared radiation. different sample absorb infrared light at different wavelengths. It is these differences that distinguish one from the other samples.
Neutron Activation Analysis: This method is a little complicated and requires the use of nuclear reactors. Neutron shot in the sample and collide with components. The result is that each component of the release of radiation at a unique energy level.
By measuring the level of their radiation emissions, forensic scientists can reveal the chemical characteristics of the sample. This procedure is very useful in studying the paint, hair, metal, soil, and many other samples.
X-ray Diffraction: In this laboratory technique, X-rays were shot in the object or substance. How X-ray beam scatters to show how atoms and molecules in the sample preparation.
The arrangement of atoms and molecules in the sample referred to as a chemical fingerprint of the sample. This laboratory techniques are useful in studying trace evidence such as paint and soil.
By using this laboratory technique for studying trace evidence such as paint chips, forensic scientists could come one step closer in solving crimes based on evidence left at the scene. Forensic science can help bring perpetrators to justice.