Forensics Chapter 7 Supplemental Questions

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Submitted By xamyx26
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Chapter 7 Review

By refracting or bending light rays
Virtual: image that can't be seen directly; real: image can be seen directly with naked eye
Light passes through two lenses forming virtual image, and a magnifying glass appears larger due to refraction, the eyepiece lens contributes to magnification
Illumination of a specimen from above used to examine opaque specimens, a transmitted illumination passes light up through a transparent specimen so it wouldn't be able to pass light through an opaque specimen
Take the power of the objective and multiply by the power of the eyepiece
A measure of its ability to gather light and resolve fine specimen detail at a fixed object distance, the difference is their N.A.
For a good general overall view of the specimen
Two compound microscopes connected by a bridge that allows you to see two objects in a side by side view
Forensic scientist could now compare a know bullet station to an unknown, at the same time and from there could match them up
Uses two separate optical paths instead of just one, and produces a 3D image of the specimen
Stereoscopic microscope; wide field view, great depths of focus, large working distance, makes it ideal for viewing bulky items
The refracted light beams are polarized, both polarized lights pass through the set perpendicular to the first crystal
To measure spectra of microscopic samples or microscopic areas on samples
The infrared micro spectrophotometer identifies the specimen, and is usually used to analyze fibers
A transmission electron microscope and a scanning electron microscope are using the broad static beam used in TEM, the SEM beam is focused to a fine point and scans line by line over the sample surface in a rectangular raster pattern
The scanning electron microscope (SEM) uses a focused beam of high-energy electrons to generate a variety of signals at the surface of…...

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