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Chapter 7
Chapter 7 Key Terms & Concepts
15
Criminology
12th Grade
06/30/2011

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Term
Binocular
Definition
Describes a microscope with two eyepieces.
Term
Condenser
Definition
The lens system under the microscope stage that collects light rays from the base illuminator and focuses them onto the specimen.
Term
Depth of Focus
Definition
The thickness of a specimen that is entirely in focus under a microscope.
Term
Eyepiece Lens
Definition
The upper lens of a compound microscope, into which the viewer looks.
Term
Field of View
Definition
The area of the specimen that can be seen after it is magnified.
Term
Microspectrophotometer
Definition
An instrument that links a microscope to a spectrophotometer.
Term
Monocular
Definition
Describes a microscope with one eyepiece.
Term
Objective Lens
Definition
The lower lens of a compound microscope; it is positioned directly over the specimen.
Term
Parfocal
Definition
Describes a microscope such that when an image is focused with one objective in position, the other objective can be rotated into place and the field will remain in focus.
Term
Polarized Light
Definition
Light confined to a single plane of vibration.
Term
Polarizer
Definition
A device that permits the passage of light waves vibrating in only one plane.
Term
Real Image
Definition
An image that can be seen directly by the naked eye.
Term
Transmitted Illumination
Definition
Light that passes up from the condenser and through the specimen; it is used to examine transparent specimens.
Term
Vertical or Reflected Illumination
Definition
Illumination of a specimen from above; it is used to examine opaque specimens.
Term
Virtual Image
Definition
An image that cannot be seen directly, but can be seen only by a viewer looking through a lens.
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