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Details

Forensic Science Chapter 7
The Miscrope
33
Criminal Justice
Undergraduate 2
10/22/2015

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Cards

Term
A microscope uses a combination of ___ to magnify an image.
Definition
Lenses
Term
A type of image that cannot be viewed directly is called a ____ image.
Definition
Virtual
Term
a _____ microscope consists of two lenses mounted at each end of a hollow tube
Definition
Compound
Term
the lens closest to the specimen is called the _____
Definition
Objective lens
Term
the lens nearest the viewers eye is called the
Definition
Eye piece of ocular lens
Term
the image seen through a compound microscope is _____
Definition
Virtural
Term

the coarse and fine adjustments are part of the microscopes mechanical system

Definition
True
Term

a transparent specimen is viewed through a microscope using _______ light (light passes through specimen)

Definition
Transmitted illumination
Term
an opaque object requires _______ illumination for viewing with a microscope
Definition
Verticle or reflected
Term
a ______-- collects light rays from the base illuminator and concentrates them on the specimen
Definition
Condenser
Term
a microscope that remains in focus regardless of which objective lens is rotated into place is _____
Definition
Parfocal
Term

a microscope with only one eyepiece is ----

Definition
monocular
Term
each microscope lens is inscribed with a number signifying its ___
Definition
magnifying power
Term

an eyepiece lens of 10x used in combination with an objective lens of 20x has a total magnification power of _____

Definition
200x
Term

the ability of an objective lens to resolve details into separate images is directly proportional to its ------

Definition
Numerical Apeture
Term
the size of the specimen area in view is known as the ------
Definition
Field of view
Term
as magnification increases the field of view ____
Definition
Decreases
Term
the thickness of a specimen in view is known as the ____
Definition
Dept of focus
Term

the depth of focus _____ with increasing magnification

Definition

Decreases

Term

a side by side view of two specimens is best obtained with the _____ microscope

Definition
Compairason
Term

a bridge is used to join two independent objective lenses into a single binocular unit to form a comparison microscope

Definition
True
Term

two monocular compound microscopes properly spaced and aligned describe the ______ microscope

Definition
Steoscopic
Term

the stereoscopic microscope is the least frequently used microscope in a typical crime laboratory

Definition
False
Term
The stereoscopic microscope offers a large ___ ___ between the objective lens and the specimen.
Definition
Working Distance
Term
Light confined to a single plane of vibration is said to be ______.
Definition
Plane Polorzed
Term

if a polarizer and analyzer are placed (perpendicular,parallel to each other, no light penetrates

Definition
perpendicular
Term

the_________microscope allows a viewer to detect polarized light

Definition
Polorizing
Term

crystals that are_____________produce 2 planes of polorized light each perpendicular to each other

Definition
Bierfringent
Term

by using the___________ one can view a particle under a microscope while a beam of light is directed at the particle in order to obtain its absorption spectrum

Definition
Microspetrophotometer
Term

the___________microscope focuses a beam of electons on a specimen to produce an image

Definition
Scanning Electron
Term

when a beam of electrons strikes a specimen_______________are emitted whose energies correspond to elements present in the specimen

Definition
Xrays
Term

Both spores and pollen can be identified and used to link a crime scene to an individual. ____

Definition
True
Term

Spores can be characterized by shape and surface characteristics through a simple visual examination.

Definition
False
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