FSCI 1010U Lecture Notes - Lecture 4: Scanning Electron Microscope, Stereo Microscope, Comparison Microscope
3 Feb 2016
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What is trace evidence: literally can be anything, locard"s exchange principle tells us that: every contact leaves a trace. Person to thing: many different types of transfers: Primary: direct contact (i. e. if i go and bury a body, and walk around on soil, there"s soil embedded on bottom of my shoes) Analytical data: what chemicals are inside, how does it behave. Instruments of microanalysis when exposed to light: many types of microscopes available for use in a forensic laboratory for a wide variety of materials, we will only discuss a few: Basic scanning electron microscopy (sem) with energy dispersive x-ray spectroscopy (eds: electromagnetic spectrum. Wavelength the distance between two successive peaks. What distinguishes energy high in energy shorter your wavelength, the higher your energy. Amplitude the height of the peaks relates to brightness of light. Frequency how many peaks pass by a given point in time per second shorter wavelength, higher in frequency.
