Chapter 17: Trace Evidence and Microscopy

Which microscope is generally employed first in the examination of trace evidence?

Stereo Compound Microscope

Comparison

Stereo Binocular Microscope

Compound Binocular Microscope

Stereo Binocular Microscope

A fiber from your vehicle that is transferred to someone's sweatshirt is considered a:

Secondary Transfer

Trace Transfer

Primary Transfer

Direct Transfer

Secondary Transfer

With inclusionary evidence, it is possible to say that samples absolutely came from the same source.

True

False

False

How is total magnification computed?

Objective lens multiplied by the eyepiece

None of these answers

Objective 1 multiplied by Objective 2

Objective lens multiplied by the first lens

Objective lens multiplied by the eyepiece

What is the single direction in which light vibrating is absorbed referred to?

Polymer Direction

Privileged Direction

Plane Direction

Privileged Direction

What is the condition in which no light emerges when two polarizers are placed so that the privileged directions are perpendicular?

Intersecting Polars

Plane Directional polar

Crossed Polars

Perpendicular Polars

Crossed Polars

If a microscopist measures birefringence and retardation what third property can be determined using the Michel-Levy chart?

Thickness

Color

Privileged direction

Polarization

Thickness

What SEm is combined with EDS what is the smallest size particle that can readily be resolved?

1 micrometer

1 nanometer

10 micrometers

1 decameter

1 micrometer

The most common use of a SEM/EDS is an examination of clothing fibers.

True

False

False

What is the most significant property glass?

Refraction Index

Fracture Lines

Thickness

Color

Refraction Index

A crack that originates from the impact point.

Radial

Conchodial

Concentric

Radial

GRIM is an automated method for determining the match point of a glass chip.

True

False

True

What component of soil can be a strong indicator of a location?

Pollen

Vegetable Origin

Animal Origin

Mineral Content

Pollen

In which type of cases are paint submissions most common?

Vehicle Accidents

All of the Answers

On Tools

On Clothing in an Auto Pedestrian Accident

Vehicle Accidents

The movement of the _ is one of the most common techniques in glass examination.

Becke Line

Immersion Line

GRIM

Conchoidal Line

Becke Line